Have you thought about hitting the rally in Hiawassee, Georgia on your way down? It wouldn't be TOO far out of your way.
It is at the Georgia Mountain Fairground Campground
on October 26, 27, & 28th.
I think there may still be a few spots left at the campground in section A but you have to tell them you're with the Airstream group in order to reserve one.
Here is the link to the thread about the Hiawassee get-together:
Hope to see you at the Fort and maybe Hiawassee too.