If you're heading along the Florida panhandle, Mobile Downtown is a nice little airport, complete with a couple of mothballed 747s that you can inspect close-up, and various airliners (BA 757s, the odd DC9) undergoing cargo-convertion, you can wander around.
In Florida itself, Tallahassee and Pensacola also have nice friendly FBOs and are packed with interesting aircraft (National Guard, Firefighting, etc).
Nassau, Bahamas has a bit of a graveyard, always several stripped-down light aircraft up on bricks, not sure if they've been scrapped or just left overnight though
