I live in an area that is sandwiched between 3 states and I can actually drive through 4 states in 45 minutes or so...PA, MD, WV, VA.
In WV the laws are pretty liberal as to CCW and open carry. However, Maryland (or "The People's Republic of Maryland" as my fireams instructor likes to call it) has tight laws. I haven't dared to drive outside WV yet because I don't know exactly what the other states laws are yet.
I do know that if you are caught in DC with even an empty cartridge in your car...not a gun...it's a mandatory one year in jail.
How do you handle traveling with your gun? Do you stop, unload your gun, put it in the trunk and go on every time you drive through another state, depending on the law?