I'd highly suggest buying a travel guide(gun laws) or checking a few websites before you hit the road.
A few bucks and time may save you a lot of hassles later....
See www.mylegalheat.com www.knifelawsonline.com www.handgunlaw.us www.gunlawguide.com
Keep in mind that gun & use of force laws or city ordinances may change.
Not all cops or state troopers you might encounter may be "cool" or "understanding".
They deal with drug runners and gun smugglers all the time.