This is a pretty good place to stay with immediate access to the little river.
when Christian Fly Fishers forum was still going, we had a group camp get together there and we all tent camped down close to the river. some of us brought our kayaks/canoes, float tubes. it is a nice campground with good bathhouse and a pool if desired. Not much shade though. Close to the park and LRO.
if you want to do an all day float, you could set up a shuttle with River John http://www.riverjohns.com/
and float to his place.
He also offers tent camping on his island.
We have several on the river campgrounds in Sevierville along hwy 66 but now that it is in full tourist season with schools out, they are jam packed.
Townsend/Walland would be a good base to explore many options.