I am finalizing plans for a 11-day family trip for 4 to Bavaria/Austria. While Frankfort is our arrival/departure city, I'm trying to firm up the best "home base" locations/hotels to see Munich (3-5 days), Neuschwanstein, Berchtesgaden, and Salzurg (2-4 days). And should I reserve 1-2 days to see Frankfurt (vs spend more time in Munich, Salzburg, or Fussen)? Most likely will try to use rail system between home bases. Travel dates are July 29 - August 10. Thank you in advance!
EDIT: Based on the initial feedback, I'll try to add some more details to request:
Family - Me, my wife, and two kids (20, 16)
Interests - History, sports, hiking, art, food
Initial Sites We Thought Would Be Interesting:
Munich - Marianplatz, Dachau, English Garden, Sabener Strasse, Nymphenburg Palace, The Residenz, Olympic Park, The King's Castles
Salzburg - Mozart History, Sound of Music, Berchtesgaden/Eagle's Nest
Frankfurt - Looking for ideas and if there is reasonable time to meaningfully see/experience anything
Hope that helps!