FIND A TENNESSEE STATE PARK
There are pics of the sites, plus you can make no-fee reservations.
Montgomery Bell SP about 40 miles west of Nashville is my personal favorite. Part of the land belonged to my grandparents. If you go up the trail past the CP church, the "Lowe Gravesite" is marked on the left. It's one of my father's siblings, who died when she was 2 years old.
Aside from the personal association, it is a lovely area.
Warrior's Path, Edgar Evins, Cedars of Lebanon, Old Stone Fort, Tims Ford, David Crockett, Henry Horton, Meeman-Shelby, Reelfoot---Just start in the east and pick you way through to the west. You will see the diverse beauty of Tennessee, for sure.
You can take US 70 from one end of the state to the other, but you do want to bypass around Nashville. I recommend SR 840 for an easy trip avoiding traffic headaches. It's also a beautiful drive.
Get a road map instead of depending on a GPS if you want to avoid interstates. Much easier.
Enjoy your trip!
Single empty-nester in Middle TN, sometimes with a friend or grandchild on board