I would do Georgia and Tennessee.
In Georgia Stone Mountain State Park. There is a Coca Cola museum downtown Atlanta that is supposed to be neat.
I would stay near Sevierville, Pigeon Forge and Gatlinburg TN and drive into the Great Smoky Mountains National Park. Lots of hiking. Be sure to visit Cades Cove. We like Big Meadow Family Campground in Townsend TN. There is also a KOA there. We usually stay at River Plantation in Sevierville but we don't mind the traffic and noise. You can also drive to Cherokee, visit the Cherokee Native American Museum and see "Unto These Hills" an outdoor drama about the Trail of Tears.
