We are planning a first (and probably only) trip to Germany and Austria this fall. We can leave the USA around Sept 18 and stay around 3-4 weeks (very flexible on timing). We travel only with a carry-on (backpack). We like some history, love the outdoors and hiking, and museums only if it is different/unusual or the only place to see something. Traveling by public transportation is fine but not opposed to car rental if advisable or helpful. We do not have an unlimited budget but are willing to spend what is needed for a good trip.
The first iteration of our itinerary – not sure if we should change direction to avoid Munich during Octoberfest (we are not big drinkers/partiers).
Arrive Berlin (4 days)
travel to Regensburg, stop at Nuremburg
Regensburg (2 days)
Munich (3 days)
Prien en Chemise (3 days) – day trips to Kampenwand and Saltzburg
Innsbruck (or Mittenwald) (3 days) - rent a car (in Germany) for the next part of a trip?
Swabian Alb (2-3 days)
Heidelberg (2-3 days)
Rhineland region (4 days) – base in Sankt Goar or Boppard
Frankfurt – fly to USA (husband)/Poland (wife)
Is this a doable itinerary? Is there anything we should add, remove, or combine?