I ended up deciding on just not going. Either you have to leave your gun at home, or you have to lock it in your car. Being in Charlotte, any thief will know that the NRA convention is in town and that many people out of state will have goods locked in their cars. A thief's dream. I emailed the NRA about my disappointment in their choice of venue. I thought the NRA was about increasing everyone's right to bear arms.
Anyways, I got some canned response back that I've seen several others get.