We stay there quite often as our daughter and SIL in the army live off Tylertown Rd. Its a nice park -- well maintained. Great management. You get some road noise but its buffered fairly well.
The river front and its parks in downtown are pretty nice. We are fanatical about the food and atmoshere at the Catfish House (if you like catfish). Its a "must visit for dinner" on each trip there for us.
Clarksville is a good sized town with the army base there-- lots of chain stores and big box retail. Fuel prices are pretty good there also