I'm from Alpharetta and I went on an AOC trip in the Smokies this past Fall. I was really pleased with the people involved and how the trip was run--all levels of experience (ultramarathoners to newbies), very supportive, even some UL folks in the mix. PM me if you want more details. The AOC website is nice in that you can see who is signed up in advance and you can contact the trip planners and let it be known what you are looking for.
Might sound crazy, but an ad on Craigslist would probably get some responses...just use some common sense precautions and don't meet at the trailhead for the first time!
Even if you aren't a runner these folks might have some suggestions: http://www.atlantatrackclub.org/contactus.htm
Talk to some of the women who work at REI too.