I really don't see how it cannot be. I reviewed those sections of the HAR, and they really don't say anything of value that would preclude. Re: national parks -- there was a bill to cover this that went into effect with a Credit Card bill a while back. You would need to look it up I don't have time.
The question would be, what if I was on a multiple day hike / hunting trip? How could a tent, a place where you can legally sleep for an extended period of time, not be your sojurn. If you go back to the jury instructions on whatever case it was we pulled up, the reason the guy convicted is because its not legal to sleep overnight in a vehicle.
O13-146-19 Firearms and other weapons. (a) No person shall use or possess bow and arrows, crossbows, firearms, pellet or BB guns, paintball guns, slingshots, or other implements designed to discharge missiles except as provided herein.(b) Firearms and other weapons may be used or
possessed if in accordance with section 13-146-41.
O13-146-41 Wildlife. No person shall molest, disturb, injure, trap, take, catch, possess, poison, introduce, or kill any wild bird or mammal, or disturb their habitat except when authorized by federal, state, and county laws, ordinances, rules, and regulations.
Of course, 13-146-41 provide nothing relating to firearms.... So as long as you were not violating 146-41, you would have to be "in accordance with" 146-41. This stuff is a bit off my radar. We are still having problems with them just giving people the concealed carry applications -- again.