Yeah, there quite a few of us here in mid-TN. As Kell mentioned a lot of us are in RL/501st, but we do lots of other stuff. Lots of superheroes, Dredd, etc. We usually have a number of prop parties in the summertime. We have a really big one in May or June every year at Ft. Campbell. People spend the night, there is a big cookout, lots of builds. It's awesome.
There's GMX, of course, and also the mini Maker fair coming later this year. There's also WW ComicCon Nashville later this year.
Chris Lee of Full Scale Falcon fame also lives in Nashville. He's a member here.
There is a pretty big group of superhero costumers who are also 501st/RL but don't really do Star Wars much anymore. I don't think many of them are members here on the RPF, though.