Place to hang Friday Night 6/21 Near Chatt. TN?

I have to take a trip up to be in Harriman, TN on Saturday morning and then leave to drive back to Atlanta late morning Saturday. I'm looking for suggestions for a good place to hang Friday night. I will be driving up after work and want to just camp for the night someplace within 30 miles of Chattanooga if possible. Really don't want to go to ground, but maybe someone can suggest a place to hang my hammock the night? Preferably with a shower in the campground too if that's a possibility. May bring a few sticks of firewood for the evenng and relax before turning in. Don't want to sleep beside or anywhere near that crazy I-75 Interstate!!
Thanks for any suggestions,

Lazybee

Savage Gulf or Fiery Gizzard are near Monteagle, Tn. Only problem is that you would have to drive back to Chattanooga to hit I-75

Harrison Bay State Park. It's north of Chattanooga but not much and would be on your way to Harriman I think so no backtracking.

that is a better idea than mine

Thanks guys this should be just perfect for my needs.
Thanks,
Lazybee

LazyBee, if you choose HBSP, ask for the tenting area. It's cheaper but also has a shower house.