Get 10 round magazines
Get a Revolver
Leave it at Home
Go To Jail
or... enjoy your vacation and don't worry about it.
Seriously, it would be a good idea to have some 10-round mags and know the laws of the states through which you travel. For instance, I know that I have to inform an officer about my car gun if I get stopped in NC or SC. Fortunately, I don't have to inform in Va.