Cab ride from CDG to the 8th arrondissement

Why not look into the Roissybus? http://www.francetravelplanner.com/go/paris/trans/air/roissybus.html This website also discusses other means of transport from CDG into Paris. We means how many people? For 3 or more, MyDriver by Sixt
The most comfortable and hassle-free way to go is with a private airport transfer. Sixt, the German car rental/hire company, offers an excellent airport transfer service called MyDriver: you book your transfer online, your driver meets you at the airport arrivals area holding a sign bearing your name, helps with your luggage, and drives you in a late-model German car or van to your destination. It's particularly convenient and good value for groups of three to five travelers.

My guess is that you'll be there around 2:30.
To verify the price, just say: cinquante euros, correct? (sankont euro). If the driver knows that you're up to date on the fare, you won't get taken.

Alan super simple , at airport follow signs to official Taxi rank, they are easy to see. Offices taxi rank has a dispatcher who assigns you to a taxi. Do NOT pay any attention at all to anyone who approaches you in terminal asking " taxi ?" Just ignore and get in rank it's well marked . Have address of hotel written down on a piece of paper , include the arrondissemnt (75008) and five to driver . If nervous have 50 💶( sorry my phone doesn't seem to do the euro symbol lol) written down too, but it's not important , it just shows driver you are aware of price . We had a driver out he meter to 55 this past June when we got in and had given him address, but I knew it was in 4 th so should be 50, so I played down and said " oh isn't the forth right bank" he was all apologies and changed it back to 50 lol. Most official drivers are honest .
We are usually out of airport in an hour or less , but that depends a lot on which terminal you fly into and amount of other planes that land at same time as you. Sometimes we are out in 30 mins, sometimes a bit longer than an hour to

You don't go through "Customs", but must pass through Passport Control, where the lines might be long, or not. Your luggage might also be delayed. Plan on at least one hour, maybe 90 minutes. Travel time to the right bank should be around an hour.
Just get in line at the Taxi stand, hand the driver the complete printed address of where you're headed, including the Postal Code. If you're nervous, add this to the paper:
"Forfait aeroport 50EU". Check the meter, which should have no money on it.
The flat fees are good for 4 passengers and their luggage.

Thanks everyone for your helpful suggestions. We have a timed entry at the Eiffel Tower at 4 and just wanted to feel confident we can get to our hotel in time for the short 15 minute walk there with as little hassle as possible.

Alan, I will just add I came in thru Terminal 2E last Sat. I was ready to be approached by the unofficial taxi folks but instead encountered guys in light blue vests that said *taxi information * pointing people to the official taxi rank and managing the line there.

It took about 50 minutes in line at passport control, bag was waiting, and about 10 minutes in the taxi queue. Altogether, from rolling up to the gate and the doors opening, one bathroom stop, the ealk to passport control, and the tide to my hotel in the 7th it was 2.5 hours. I thought that was pretty good as I was expecting about 3 hours.

Have a wonderful time!!

You don't go through "Customs", but must pass through Passport Control

It depends on where you're arriving from. If you're flying through a Schengen country like Iceland (which I did in March), you don't have to go through passport control at CDG, which really speeds things up. You still have to go through Customs, but that just means walking through the Nothing to Declare door.

Does anyone know what the fixed rate is for 6 people in a minivan to the Trocadero area from CDG?

"Does anyone know what the fixed rate is for 6 people in a minivan to the Trocadero area from CDG?"

58 euros, 50 euros is the flat rate for up to 4 persons and the extra charge is 4 euros per person. There is no additional charge for luggage, Speaking of luggage, there is not a ton of room for luggage in some Parisian taxis that can hold six passengers. I have been in a couple with a group of six and we and our luggage fit but we are very light packers. We each a carry-on bag and an average-sized backpack.

Thanks for the reply. Yes, 6 people in a taxi would be cramped. The car services charge 130 euros for a MINIVAN for 6 people plus luggage. Are MINIVANS available at the regular taxi stands at the airport? Do they charge less than the car services?

yes, a taxi would be less than a car service (and there will be taxi minivans at the airport). As JHK pointed out, it would be 58 euros.

My brother took an Uber minivan from the airport a couple of weeks ago with six people including our dear parents, and he paid 70 euros to the 12th arrondissement (right bank).

Thanks Kim! Is there an advantage to taking an UBER Minivan instead of a taxi Minivan?

Uber cannot pick up at the taxi stands in the airports or train stations. You must arrange to meet the driver at some other destination.
Just get in the official taxi line, it's really the simplest option. The dispatcher will put your party in the appropriate vehicles, and the flat fees have already been explained.

We touched ground at 8:30, then taxi'd to the gate, then got of the plane, then hit the bathroom, then went through passport control (no customs), at some point got our checked bags, then followed signs for the taxis, then about 4 airport workers were lined up ready to help us, assigned us a taxi, we hopped in, it's 50 euros, and well worth it, 30 minute drive to inner Paris, and we were at our hotel at 10:00 am. Dropped our bags and walked the Tuileries waiting for our room to be ready. You'll be fine. (Know the address of your hotel, even the best taxi drivers don't know them all)