Allison,
You've got two fairly good bets:
Divehaven in White, GA is just about an hour's drive from the shop. They have very good entry and exit points, restrooms and showers. Diver's entry fee is $25.
Loch Low Minn in Athens, TN is about two and a half hours away. Very pretty dive site with Paddlefish! Diver's entry fee is also $25.
I hope this helps. Please call me (Jim) at the shop sometime and we can talk about some other great, inexpensive dive opportunities! 770 579 9700.
Thanks for your question!!!