I know some people enjoy weighing in on itineraries, so I'm tossing it out there for critiques and suggestions.
Husband, myself, and 7 (will turn 8 mid trip) year old son, backpacking and using trains (still working on p2p tickets or flexipasses thanks to help in the transportation forum). Our trip is starting and ending in Luxembourg City. Son and I spent a month in Europe last year (Lux, Cologne, France, and Athens) with my brother, this is my husbands first time overseas. Any hotels booked at this point have 100% free cancellation until the day before arrival, so there is flexibility. I just jumped on ones that had good reviews, vacancies, and were decently priced.
11/21 Day 1: arrive in Luxemburg 11/21 in the evening. Staying there that night.
11/22 Day 2: Leave Lux in the morning and head to cochem. Exploring Cochem that afternoon/evening, staying at Hotel Heironimi that night.
11/23 Day 3: Breakfast and depart for Rothenburg ob der tauber. (Hotel Glockeweingut)
11/24 Day 4: Full day in Rothenberg points of interest: General sightseeing, night watchman tour
11/25 Day 5: Leave Sunday morning after breakfast and head to Munich. I'm worried that a day and a half is too much time (off-season) in Rothenberg, but knowing Germany's penchant for shutting up house on Sunday, it seemed like a natural day to travel.
11/26 Day 6: Munich Points of interest: general sightseeing/shopping, day trip to monastery out of town maybe, Christmas markets
11/27 Day 7: Munich (Opening of Christmas Markets! yay!)
11/28 Day 8: Depart for Cologne/evening in Cologne *Points of interest: Christmas Markets, Dom tour, maybe chocolate museum, drinking a Kolsch :-) *
11/29 Day 9: Cologne (meeting up with family)
11/30 Day 10: Cologne (with family), depart in early evening and head to Krefeld
12/1 Day 11: Krefeld Points of interest: time with friends
12/2 Day 12: head towards Luxembourg
12/3 Day 13: Tour Luxembourg points of interest: The Grund and general walking tour
12/4 Day 14: Head home from Luxembourg
I'm debating on shortening up the time in Rothenburg and adding another day in Munich, but it'd be an extra day that's a Sunday. I'm open to other stops along the route as suggestions. I'd love to consider going to Salzburg, but I don't think I have time. I'm pretty locked into the 29/30th in Cologne and obviously the arrival and departure dates, but otherwise, I'm flexible.