MAK,
Another correction. I'm sure gregbell's info on German airports is spot on and the advice on th Jepp trip kit is a sound one. But his comments on Belgium are so far off the mark it's not funny! The comments are obviously based on personal experience but, as a blanket statement, they certainly don't reflect my experiences of a decade using Belgocontrol's services. I fly through Belgian airspace practically every time I take to the air. I've never had a problem with access to airspace. You have to steer clear of the Brussels CTR but that's about it. I have not yet been denied a clearance into Brussels Class B VFR or had a routing request denied by the guys at Liege, Antwerp, Ostend, Charleroi or Beauvechain. Just last week, transit from CMB to Liege at FL55 VFR with Brussels, Charleroi and Liege.
If you do find yourself transiting via Belgium, I'd suggest Spa (EBSP) as a stopdown. Friendly folks, great location in the Ardennes and (relatively) cheap fuel.
Have a great trip!