I painted at the Dalton (GA) Saturday Market last week. It's a small pocket park beside the courthouse where the Saturday Market is now happening every Saturday through September. You just show up around 7:30am. The spaces are first come/first served. If you're selling anything, the fee is $10.
Let me know where you'll be plein air painting in Georgia, and I'll post it here. And if you'd like to join us as we venture out to 'paint Georgia', we'd love to have you.