Originally Posted by
LondonElite
Just take trains. It's much more relaxing and easy to do. Amsterdam to Cologne, where you can go shopping, then a train along the Rhine, where you can see plenty of castles. For the Black Forest you'll need a car, but you understand that it's a big forest, right? There are some spectacular roads to drive on and wonderful towns and hotels, but it might be more helpful if you specified what you're looking for there. From Stuttgart you can drive the slow way to Munich and see plenty of castles (Lindau, Neuschwanstein, Hohenschwangau, etc) and beautiful scenery. Maybe stop for a day or two near Germany's highest mountain, Zugspitze. I think you should open an atlas to get a sense of directions and distances.
and I would suggest adding six more weeks of time