Probably find some decent jerky, maybe even some good sausage (this IS the South after all.)
When I used to go to big shows out West, I went looking for things like primers, oddball ammo for guns that I owned, things I couldn't find (those shows were before the Net really exploded with billions of sources). Many shows usually had folks who sold and collected various things from war memorabilia, certain types of guns, etc., so if you are into any of that, look for that. They were also a good source for things like holsters, gun cases and green ammo cans.