Agree with the train ride, the cable car to the top (or walk if you want/have time, etc). Light show - yes. Now the audience is predominantly from the South to begin with, but when they played '"Georgia On My Mind" the crowd went BONKERS. Same with the playing of Dixie. Agree also with Georgia Aquarium. We also took in the Coke Museum/Tour.
Sites - we were in the loop around the office (also loops around the pool) and if I had to do it again I'd opt for a site in one of the other loops for the shade, level or not. Do yourself a favor and monitor the voltage to your RV, especially during the day. Under the hot Georgia summer sun everybody's A/C was running full tilt, and voltage dropped, although not enough to warrant shutting down our A/C and other appliances. Came close, though. Nice place. Regrettably we were not there for a carillon performance.