nutshell: Open carry: National Forest or BLM land A-ok Concealed(no permit): In your campsite! You can also carry on your way to or from fishing/hunting. Prohibited: National Parks vehicle travel: firearm and ammo must be locked up separatly(one or the other locked up). The glovebox does not count. ...

There are "convertable" tents out there too, you can take or leave panels that regulate ventilation.