Looking for a place to park your RV? 

Long C Trails (Macon County: Area 5) has RV spaces
with electric and water hookups.

Hillsdale Estates (Macon County: Area 6) has RV spaces
with electric and water hookups.  (Note: this is primarily a mobile home park.)

Deep Valley RV Park (Overton County) has 28 RV spaces
with electric and water.  Ten spaces also have sewer connections.

As all RVer's know, Wal-Marts around the country welcome you to pull into their parking lot and rest.   Here are Wal-Marts in the area:

Lafayette, TN: Supercenter on TN 52.
Carthage, TN: Wal-Mart on TN 25.
Gallatin, TN: Supercenter on U.S. 31-E.
Franklin, KY (north of Portland, TN):  Supercenter on U.S. 31-W.

If you need additional places with hookups, you can search various online directories such as Woodall's.

http://www.woodalls.com/search/camp/