I would probably try Acworth Beach, technically it's lake Acworth, but if you go there that's right where Allatoona and Acworth are connected by a spillway so really you could fish both lakes. I'm pretty sure there is a couple of docks here as well. It's supposed to be pretty warm on Saturday so the spots should be moving up towards the banks which will be good for you. I've only been trolling for crappie lately since its been so cold, but supposedly jerk baits, crank baits, and A-Rigs have been doing the trick now that it has warmed up. Good luck!
http://www.allatoonalake.org/parks/acworth_beach.html