We played tourist in Gatlinburg in September and had a blast! I have family in the area, so we don't usually do the shows or other attractions. This time, we did. The Hatfield and McCoy Dinner Show in Pigeon Forge was loads of fun, and surprisingly, the food was good. It wasn't 4 star, but better than some of the chain restaurants in town. We scored free tickets to Wonderworks, also in Pigeon Forge and loved it.
Cades Cove is a must see. Don't forget to stop at the cable mill. We also love the Roaring Forks Motor Nature Trail in Gatlinburg. Just follow Nature Trail up the mountain and enjoy. Stop at the pull outs for more nature and some gorgeous views.
I love people watching in Gatlinburg. The moonshine and whiskey tastings, for the adults, are fun, but be careful. Those little cups of liquid joy can add up quickly and you might get a buzz when you're not planning on one. Or maybe I'm just a lightweight.
The outlet mall has some decent shopping. That's not why I'm there, but I have friends who take weekend trips to Pigeon Forge just to shop.
Corkys BBQ is awesome! If you like brisket, you'll be a very happy camper. The Old Mill is good too, and the mill is great for taking photos.
Have fun! If I think of more things to do, I'll post again. Frankly, there are so many things to do that I don't think you'll get bored. Even the grand kids will be happy.