Nice little chunk you have there. Yes if you are in the right area you can find quite a bit. So, I guess that if your right and you find a 50 lb. piece, you can't collect another piece for five years? ( I remember it was 100 lbs. per year. ) Area you collecting on private or BLM land?
That's really cool! I'm a New Yorker but went camping in Montana two times for a couple of weeks. I've wanted to move there for years. It's beautiful country and you are very lucky!!!