Should work great for small stuff.. These things are the "Ginsu" of the saw world IMHO.
I've used a slightly larger size of one of these for everything from wood, thick plastic (ABS/PVC/etc), plaster, etc..
Obviously nothing metal filled, but for camping purposes, this thing should rock. I'd imagine anything under 4-5" should be fair game. I'll do some testing tomorrow.
Only thing about this one, the handle doesn't seem ultra rugged, it's light wood, which, helps alot with the weight. It's also not full-tang, so, don't expect it to last forever.