There is an excellent book--"The traveler's guide to The firearms laws of the 50 states". Tells you everything you need. Updated yearly. about $15. Concise with the important info
I believe the laws change when you are driving and when you are camped.
You can certainly look up the details. I wouldn't trust my freedom on someone's interpretation here.
MIKE--The same book tells which states honor your permit and which don't. Most do but don't trust your freedom .......