I found a Southeastern Antique Radio Society that has a swap meet September 25 in Atlanta. I take it that you have to be a member? I'm not sure exactly how these clubs work since I've never been in one.
http://www.sarsradio.com/
There's also an Antique Wireless Association in NC that has a swap meet in November in Greensboro, NC. Looks like they had one back in January that got cancelled, probably due to the snow that postponed our Charlotte Elvis Fest.
http://cc_awa.homestead.com/index.html
I wouldn't mind joining some kind of antique radio club. I'd probably be one of the younger members, which wouldn't bother me at all.