We LOVE Tailgate. We have been to almost all of them in Tennesee. If you are coming from Georgia or Alabama, we highly recommend stopping by here for a pizza or a beer (or 2..or 3.. we don't judge).
Spreading out the trip and spending a day in Chattanooga, the Aquarium would be a fun experience!
TBH I've never been there (Spencer), but I see a ton of signs for it between Nashville and Atlanta. If you check it out, let me know how it is!
If you like to visit college campuses (aka Eddie Moore), here's one in Chattanooga. Fun Fact - the Best Man, Hunter Arnold, went there. I'm sure he could tell you all the great spots!
Both Stewart and I are UT haters (GO DAWGS/DOGS), so it pains us to add this... If you would like to walk around the campus, the venue is only about an hour away.