Understand the gun laws in each state you are in. Don't open carry, it just calls attention to yourself and you might find yourself laying down in the dirt with a LEO pointing his gun at you. Some states require you to noitfy a LEO if you are carrying concealed with a CCW.
Consider a safe in the trailer for securing guns. I don't like the idea of leaving the trailer with guns unsecured. You could get a small gun safe and if you have storage under your RV bed like most do, you could lay it down and bolt it to the floor.