321 from Gatlinburg is not a bad road. It is 2 lane but most of the route has a decent shoulder except for the last 2 miles. We did it in a 40' MH, in the rain, without any problems. A few tight curves but very scenic and MUCH less traffic than going through Pigeon Forge and Sevierville. I'm not fond of driving a MH through Gatlinburg, Pigeon Forge and Sevierville. Don't take Foothills Parkway off 321 to I-40 though. Very twisty and low branches and a very narrow road.
Dawn and Mark
06 HR Endeavor 40 PET