Caodog, thanks, I've been researching there as well and I've bookmarked those!
Bob, thank you! I'm trying to firm up a sort-of itinerary - which will be "pass-dependent" as well - trying to max out on the beautiful passes.
So far it kind of looks like:
Two nights Munich, pick up car.
One night Zell am See, next morning Grossglockner all day.
One night Heiligenblut
Two nights in the Dolomites (Castelrotto or Bolzano?)
The day we leave the Dolomites, we will take the Stelvio Pass, into Switzerland -
maybe stay one night near St. Moritz (I visited Pontresina a few years ago...)
Two nights in Varenna (maybe 3 nights?)
Two nights in the Mont Blanc area (Chamonix? Annecy?)
One night in Vevey - since it is so close to Annecy/Chamonix, we can actually see a fair bit of it with only one night, since we'd arrive early and could leave the next day as we wished.
Three nights in the Berner Oberland - unless of course we head out early enough to see Neuschwanstein, maybe a night in Fussen.
Last night must be Munich.
We have to go through the Grand St. Bernard Pass - trying to figure out where that ties in, after Varenna. (and the Grand St. Bernard Hospice)
I'm still researching the other "must-see" passes and so on.
We'd be up for light hiking in the area, too. Still thinking about this, but it's taking shape finally.