We’ve just camped for a week in Assen 2 hours north of Amsterdam and then a week in the northern Black Forest.
Spend at least a day if not more around Amsterdam, it is such a lovely city. Forget the cliche sex and pot stuff, there is so much to see and do there. We parked in the old Olympic stadium, 2.6m clearance so good for a T6 loads with bikes (which ours always is), very safe. It’s a 20 min easy tram ride from the centre through a beautiful part of the city off the tourist track.
The Black Forest is beautiful but it was not quite what I was expecting having spent the last few years camping in Dordogne. It is lovely but with regular reminders of German utilitarian stuff. Locals were mostly very friendly but we received some low levels of hostility each day. The lack of UK and French cars is notable. If you need a fix of non German then slip across to Strasbourg for a full day, it is a truly beautiful city.
Find a Rodalbahn, they are excellent fun. Cheap and a great day out.
We did the treetop walk at the top of the Sommerbergbahn outside Bad Wildbad. That treetop walkway gives you a real sense of how enormous the Black Forest is. Well worth doing as well as the wobbly suspension bridge. Look it up.