Pigeon Forge is definitely up there... we stopped there on our big cross country road trip. You can see some photos of it on this page:
http://www.i-mockery.com/minimocks/a...dtrip/day2.php
Actually, pretty much everywhere we went on that road trip was amusingly cheesy in some way or another. Roswell... the Dr. Pepper museum... Clines Corners... etc, etc.