I'm seeking suggestions for an upcoming trip to Munich in early December. We'll be traveling with another couple, and we are planning to use Munich as a base for a 6 night stay. My proposed itinerary is to spend a few days sightseeing in Munich, touring the Christmas markets and visiting museums, and then day trips to possibly Nuremberg or Regensburg and Salzburg (via train) and Neuschwanstein Castle (considering a car rental but would likely opt for a bus tour).
We've booked the hotel and I've been reviewing Rick Steves' Germany guide for suggestions. We've been to Germany and to the Christmas markets in Vienna and Budapest in the past but I was last in Munich in the summer of 1969 (!) on a day trip with my parents from Salzburg (I loved the salt mine tour outside Salzburg as I recall) and have vague memories of walking around Munich.
Any suggestions for the trip, things to avoid or watch out for ? Thanks.