Stone Forts is probably your best bet it's about twenty minutes drive from Chatt and there's plenty to do there.
You also have Rocktown near Lafayette in Georgia which is about 40 mins southeast of Chatt, but could be stopped off at on the way from Atlanta.
Rocktown is probably the nicer of the two areas to hang out at as it's in a big forest, Stone Fort in my opinion has the better climbing and is nice as well in some woods but you are just off of a golf course.
Both areas have a guide, but they are extortionately priced, especially for how long you are going to be there. You also have to pay to climb at both areas, i think it was about $5 at each.
There's plenty of really good little unguided areas about but you need to be about for a while to find out where they are, so i'd say stick to the big areas.
What sort of grade range are you looking for problems in? I'll dig out my guides and see if i can remember what problems are worth doing, but to be honest there are classics all through the grades so you can't really go wrong.