There is a new campground close called The Ridge Outdoor Resort that is nice, with large sites. If you are wanting strictly motorhome resort there is one in Sevierville called The Dell Motorcoach Resort I believe. Hope this helps.
We have not stayed in one of the campgrounds near Dollywood. With that said we have stayed near the KOA and it looks like a place our family would stay with our pull trailer. Additionally i have hears Jellystone is nice as well. But there are numerous campgrounds there with varying amenities.
We saw a couple that appeared to be very nice! 😊
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