Indeed, the buildings are from 4Ground. Most of the terrain is from Architects of War - with the rivers being of the GF9 sort (although I plan to replace them with home made rivers). You are correct, they do stick in storage ... I have to be careful how I stack them. If you do use paper to separate them, use wax paper as regular paper will end up sticking to it as well and is a total pain to get off.
This was my second game of Bolt Action. I really enjoy the rules - they are fast paced, easy to pick up and remember, and I think give a great feel for the period. That being said, if all you play is WW2, then I could see where one might want a move involved set of rules ... but that isn't what I would be looking for ... I play lots of different periods ... and I can easily remember these rules. The reference sheets are outstanding for the game as well.
Regards,
Jay