Hi Andy,
Plenty of great roads in the Black Forest, including the 500.
Last year we spent a couple of nights in this hotel :-
www.hotel-waldblick.de It's in a small village called Schenkenzell about 15 miles south of Freudenstadt. The village itself is not very inspiring but there's plenty round about. The hotel is superb, the food superb and it's a member of the Motor Bike Hotel organisation ( garage!)
This year we stayed a few days at this hotel:-
www.jaegerstueble-fds.de It's right in the central square of Freudenstadt, again the food is great and they have a lock-up which bikes can use
We also stayed in a small guest house - Pension Anna, in Titisee, about 20 miles east of Freiburg, another great area with great roads to explore. I can supply an address and e-mail for this if you interested?
Cheers..........................Grizzly