Opinions on my Paris Itinerary please

Highly recommend walking tours with the company called Paris Walks. A wonderful variety including a chocolate tour. Check out their website for specific information. You won't be disappointed.
Also, visit the Cluny museum in Paris. Excellent.!

Museum de Orsay is a must! You shouldn't miss this one. Start with the fourth flour to see the impressionist art.
Don't forget to visit the Opera House, too Outstanding!

Sounds great. I also enjoyed the Pompidou center - modern art and an interesting building.
My best memories are the local market and just strolling along the Seine.

We were in Paris in April with tween daughters and they wanted to visit the Catacombs. The line was unbelievably long and we simply could not wait for hours. It may be possible to book online for an entry. The walk (did it years ago with no lines) takes about an hour and they allow only 45 people at a time. Have a great trip--we stayed at Hotel St Louis--nice location.

I second using Paris Walks. We used them our first time in Paris for the Montmartre and St. Germain neighborhoods. We learned more history about the areas than we could have on our own. We will be going back in September and using them again for a tour or two. We also used Paris Greeters on that trip. We were staying in the Canal St. Martin, and it was great to explore the area with a greeter. We fell in love with that area so much that we stay there each time we go to Paris. If you are wanting another spot to explore, I recommend the canal area too!

As mentioned earlier, the Orsay is a must! You didn't mention the much-visited Notre Dame cathedral, but on the square out in front of it, slightly off to the left and down a few feet below street level, is The Crypt, a fascinating archaeological site that shows some of the foundations of Paris from Roman times, including some remains of heated floors in one building and ancient streets and passageways, virtually tucked away from the masses up on the square. It's not a huge site, and is well worth a short visit (or linger if you wish!)

At Versailles, we rented bicycles, which made covering more ground easier than walking, but that might not be a viable option if you're considering motorized transport.

Pere Lachaise can require a lot of uphill travel if you explore much, if that's something that might affect you or your companion.

Strolling Rue Montorgueil, with its exceptional chocolate shops and other food vendors, might give you a taste of Parisian gastronomy without the tour.

I took the "Le Croissant & Breakfast Pastries" baking class at La Cuisine and really enjoyed the class. I've continued to make them at home with great results. I see there's still openings for the Sept. 16 class.

This may be a dumb question, but why are you doing Versailles on your own when your tour group will be going on Sept 16th? Wouldn't it be easier to go with the group and spend Sept 7th in Paris?

Book online tickets for the Catacombes. There is a dedicated entrance right in front - roped off, easy to find.
The lines wrap around the block, so I'd buy tickets as soon as you can.
Would not recommend going on the weekends - it will still be really crowded.

Are you purchasing your Museum Pass before departing home to Paris? You can just purchase them at CDG from the Tourist Info Booth next to where you pick up your luggage for a cheaper price. If just doing carry-on, you can still head down to Baggage Claim area and purchase the Pass or at any of the other booths.
Enjoy your trip.

A couple of thoughts:

1. Invalides, the place is really huge. If you want to see some of the Army museum, it's almost like the Louvre. Pick a subject that interests you and don't try to see it all. You may just want to see Napolean's tomb. If so, that won't take more than about 30 minutes (plus any line to get in).
2. September 16, is part of national heritage days. Many buildings are open to the public that normally aren't. I was there last year for the weekend and visited the Luxembourg palace, where the Senate meets, one day and the Elysee Palace, where the President works, the next. I got in line very early, a little before 8, for Luxembourg and was through the door quickly. The next day I thought I'd worried too much about the crowds at Luxembourg, and didn't get to Elysee until 9:30. I ended up spending probably six hours in line. By 10 am they had closed the line because they enough waiting for the entire day. I'll be there again this year but I'm planning to visit Chartres, who will also have some things open for heritage days.
3. When I went to the Louvre, I had my pass, no bags and arrived probably more than 30 minutes before opening (I think the last few days of September). I was first in line for passes and because I didn't have any bags, I was inside the museum well ahead of anyone else. I decided to walk straight to the Mona Lisa. A Canadian couple, who were first in the pre-purchased ticket line, caught up with me and we had the room to ourselves for at least five or ten minutes before people started showing up.

If you're worried about all the walking at Versailles, are you sure that you can do the catacombs? The walk underground is apparently long and the path is uneven. There are also a lot of stairs. (I haven't done it myself.)

I agree with the Paris Walks suggestions. I've done ones that I didn't have a special interest in (Hemingway, even though I'm not a fan) and still found the walk very interesting. So don't worry about matching up your interests perfectly.

Just my 2 cents worth...
Day 1:
That actually looks like a decent first day. You'll likely be tired from your trip. But all of those sites are close to each other and none are stressful. FWIW - you may want to wander over to Shakespeare and Company bookstore just to see it. Think about the Museum de Deportation. Its about 100 yards from the back end of Notre Dame, doesn't take long, and is worth the visit. Don't know your budget - but dinner at Le Coupe Chou would be lovely.
Day 2
2 Hours at the Louvre seems shortchanging yourself. You'll just be able to dash in, find the Venus de Milo, Mona Lisa, and Winged Victory. While the Louvre is huge and intimidating - I'd give yourself 4 hours to just be able to appreciate it. I think you could do that - still walk the Tuileries Gardens and visit the Musee de l'Orangerie.

Day 3
Dedicating a full day to Versaille is smart. You can take the RER from the St. Michel metro stop all the way to Versailles.

Day 4
I'd substitute the Musee d'Orsay for Les Invalides. Or I wouldn't allot much time to Les Invalides if you want to see Napoleon's tomb. But as others have mentioned - I'd work on getting d'Orsay into your itinerary. And the way you've got this day planned - you can easily have some available time.
Day 5
Not sure if you plan on coming back to Paris or if you've been there before - but if the answer is no - I wouldn't dedicate half a day to a spa. But that's a personal thing. But maybe consider 60-90 minutes at Pere LaChaise.
Day 6
Montmarte and the Luxembourg Gardens are kinda on opposite sides of the city. Don't know how much time you have - but I'd think about concentrating in one area. Luxembourg Gardens are nearer your hotel room - but if you postpone that until after the 16th - maybe do Pere LaChaise with MontMarte?
Miscellaneous
I'd vote no on a Seine Cruise. Touristy and meh. I'd spend my time walking along the Seine. Other thoughts: If you like Modern Art - then the Pompidou Center. I kind of like the full walk from the Louvre to the Arc de Triomphe (and grabbing an ice cream in the Tuilieres Gardens. We actually enjoyed the Cluny Museum - and its near a great restaurant (that I can't remember the name of) that's been around since Hemmingway. But the best thing to do in Paris is just to immerse yourself in the city and just enjoy the vibe. Its my favorite place.
To Susan Blake: My guess is that maybe they're not doing Versailles with the group because they're going to use the Museum Pass to skip the lines (which I highly recommend).

Anyway - hope all of you have a great trip!

Thank you everyone your tips are greatly appreciated. We will do Paris Walks. Sounds great to me and I will add Museum de Orsay as a must do. Will be no trouble adding that. The Seine cruise is out instead we'll stroll along the Seine and love the idea walking Rue Montorgueil for samples. I'm going to do the Paris Greeter. I think this will be great fun. I really want to see Pere Lachaise but I might have to leave that for another trip. Looking things over I might be running out of time. The Catacombs I think too might have to wait for my return.

Cyn: Notre Dame I have for Day 1 and I'll add the Crypt to that day. Sounds interesting. The bikes are the way we'll go for Versailles. I asked my companion and she can ride a bike yaaa so that's a go. Thanks for the Rue Montorgueil idea. We'll do that.

Jean: If we can't fit the cooking class in I'm adding that to my next trip for sure, plus a few more.

Susankblake: Not a dumb question. It makes sense but the group spends the morning driving around the city before going to Versailles. I thought we could use the Museum pass and skip the line. Plus the group wont have any time to spend in the garden.

Brad: Great ideas. I'm looking to incorporate them, thank you.

Dave: Forgot to write it but Museum of Deportation was on my list for day 1. The dinner suggestion we'll do. I thought we'd mix easy, cheaper meals with a few dedicated fine dining. Our Louvre time can be altered. I built in a little extra time in case we want to see more.

This trip is really all about and for my travel companion, my coworker. She's 70 years young and her life long dream is to see Paris. So I'm taking her. Funny thing was when I asked her what she'd love to see she couldn't name anything. Just said she'd do anything I wanted to do. The only thing she asked about was a facial and massage. Shrugging shoulders but she asked so it's in the plan. I bought her a travel guide and she's reading it now getting more familiar with what we'll see and do. I tried to plan each day with things to do and see but also time to just sit, relax and enjoy being there. I can't wait to see her dream come true.

I may be in the minority, but I did not enjoy the Catacombs. I thought I would. It was one of my "must sees" on a 3rd or 4th trip to Paris. But, it's a long trek underground (I'm a little claustrophobic). There's no other way out. There are a lot of stairs to get out. I know this will make me seem like an impatient American, but really.... After a few minutes I got the deal, and was done. But you had to trek onward to the end.

Having said that, I love cemeteries. Pere Lachaise is a bit out-of-the-way, but it is lovely (and not claustrophobic at all!). Closer in is Montparnasse Cemetery, which is also very interesting.

Do you have time planned for sitting in a cafe and watching the world go by? It's a must!

What about a cooking class? I did one a long time ago, but it is still one of my favorite Paris experiences.

If you are in the area around the 14th arrondissement on either Wednesday or Saturday, you can visit the Edgar Quinet open-air market, which is very close to Montparnasse cemetery, and would be easy to manage.
Pere Lachaise is mostly uphill, if you go through the main entrance, and is paved with wobbly cobblestones.
I don't think there are many chocolate shops on rue Montorgeuil.
There are a lot of them in the Marais, on rue de Rivoli, which runs into rue Saint Antoine - as well as two very good pastry shops, Lenotre and Dalloyau. Start at Bastille Metro and work your way towards the Louvre.

Saving this post for future reference. Thanks!