Wow! You could spend an entire summer just in the Gatlinburg area alone! After you've seen Gatlinburg, then get off the beaten path and see how the real world lives. Find the little mom-and-pop restaurants along a back road in the middle of now where, or a shop that sells artifacts from the local artisans, or hike the trails, mountains, swimming, horses, you name it! Google search "Attraction", just in the Gatlinburg area, and you'll have enough hits to keep you occupied for years!
Head on to the Blue Ridge, a new Google Search, and you'll find everything imaginable. Lots of history in that area, pioneers, American Indian heritage, Civil War, you name it!
Campgrounds? You probable will not find a bad one anywhere. That part of the country is just jam packed full of stuff, from amusement parks to historical cemeteries. How about haunted houses, haunted places, haunted tours, oh my. Its all a matter of what you're interested in! The sky is the limit!
Some things to Google Search on are:
Weird Tennessee
Weird Virginia
Road side attractions (name your state)
Road side oddities
(name your city or county or state) and "attractions"
"What to do in ...."
And you'll be blown away.
Limit your search to your interests and this will drive you.
One year, we did a search for Rail Road museums in Indiana. Found out in Indiana there were 7. That 2 week summer vacation, we hit all 7 museums. Traveled from middle Indiana, to the Southern part, back to the top North, west, near Richmond Indiana (Ohio line) and finally back home. It was one awesome trip!
Internet search is your friend!