Isn't it funny how dogmatic, almost "religious", some people are about their atheism?
Live and let live - if you want to believe, fine; if you don't, fine.
It's the fanatics and dogmatists at both ends of the spectrum that cause the problems, imho.
btw, I think this camp is a good idea - anything that gets kids outdoors, and teaches them to think independently at the same time, can only be a good thing.