Very nice pictures Scott.
As for the baby powder, I suggested it above, but had not thought about the clean up, though I used it one year and can't remember about clean up. (Wait until you get old before you laugh about that one!)
However, if the original poster is planning on using it for a permanent layout, then it could turn out great and just the thing he needs.
And, every once in awhile, when the scenery looks a little drab, he could buy another container of it, and have a snowstorm to brighten things up!
Chris, I sometimes use cans of spray snow on my temporary Christmas layout. I have found that if I hold the can way up in the air, and let it "snow" on the items and fall like real snow, by the time it hits on the surface, it has dried and is fairly easy to get off when packing up. If sprayed directly onto the item....it does not always come off easy, and can even stain.
I assume you have had good experience with it?
Greg