I have been saying for years that I will do a bike ride around the Bodensee and next year is going to be it. I am going to spend some time getting my bike sorted out and upgrading a load of stuff on it before I head over there.
I am planning on a rather extended trip. Doing Vienna to Salzburg and then going from Salzburg to the Bodensee and then doing the circuit around the Bodensee. I am also going to do the extension around the Bodensee to Shaffhausen and the Rhinefall.
If I plan things right, it should take me about 10 days.