I don't believe there are any. The problem and challenge will be proving the person carrying the 2nd weapon isn't "hunting".
In the truck, you're not hunting or shouldn't be. You can have all the legal weapons you want. As a citizen, you have every right to drive down the roads in our NF with a weapon in the vehicle, with no hunting license, even when there is an open season. If stopped, one of the first questions a game cop will ask is if "you are hunting". An admission opens up the flood gates.
The other person packing the backup may want a small game license just to keep things simple should you make contact with a Gamey. You do however, again, have the right to walk our forests with a weapon for personal protection or for whatever reason you choose. Again, the challenge will be attempting to prove the guy next to you isn't hunting, when you are. That small game license will make things a lot easier.
State Game laws don't trump Federal laws and our Constitutional Rights. They tried that here in Oregon and lost, having to re write a few of the game laws, specific to carrying weapons in the field, "while hunting".
For concise legal advise I would contact the lawyer of your choice, I would not be asking a game cop. He may tell you under what circumstances he would write but whether a conviction would stick, I would be asking the lawyer.