You can still carry (in MS) within the confines of your home and vehicle - you don't need a concealed weapons permit for that. So, if you're not already carrying in your car, you should be. In MS, your car is considered an extension of your home, and under the Castle Doctrine, you're permitted to use deadly force to protect said "Castle" (or anyone within).
Also, though most states recognize MS's concealed carry permit, some states do not. The state of FL issues permits to non-residents, and you can apply on-line (though you do have to mail in a fingerprint card). As of a few years ago, more states recognized FL's permit than MS's. I also think Montana or Wyoming offer a non-resident carry license that is more recognized than MS's. Just something to think about.
Lastly, if you're ever pulled over by the State Patrol, present your carry permit along with your license. It has helped me 3 times get out of a ticket. The trooper is instantly aware that you are (or were at the time of issue) a law-abiding citizen, by virtue of the background check required to get a permit, and your honesty to inform him that there is a weapon in the car or on your person. I've had several troopers thank me for making them aware that a firearm is in the car, and then let me off with a warning. They often want to know what you carry, then want to talk shop. Just an idea. On a related note, I'd be leary of using this idea when being pulled over by city police and hick sheriff departments. I use my own judgement when pulled over, and there are just times that it seems appropriate and times that it doesn't. But the times I've decided to whip it out (for full disclosure's sake), it has worked.
Oh, yeah - and be aware of the places you can and cannot carry once you get your permit. The law states the specific places you can't carry, like schools, polling places, federal buildings, peaceful demonstrations, etc., but you also are prevented from carrying any place that specifically (and openly) states that they do not allow weapons on the premises. If there is a sign that says they don't allow concealed carry, you must abide by their rule, or you'll be in violation of their RULE. However, the good thing about this, is that they can only ask you to leave...you can't (shouldn't) be arrested for violating their rule, should they call the law.
I never leave home without a weapon, and have two in my vehicle at all times; one goes with me when I leave the vehicle.