Aim
You've answered that question I was about to post!! I'm off to Vienna a week on Friday and plan to fly along the Alps as you describe, passing right by Whirly in Salzburg on the way. I was looking to stop somewhere overnight on the way and was wondering if anyone has been to Konstanz. So now I know!
I'm armed with the Bottland for half of western Europe, and about 8 of the Jepp VFR+GPS maps, so we are just about ready. I hope to compare notes on this thread with Whirly when we get back.
PD