A couple long days.
Day 1 drove from DFW to a state park near Eureka Springs Arkansas.
Day 2 all the way to an RV park in St. Louis.
Day 3, Did the Gateway Arch before loading up, drove to Lake Cumberland State Park in Kentucky. Spent two nights here, drove a day trip to an old coal mine and did a tour into a mine.
Day 5 drove to Gatlinburg TN, stayed 3 nights to have 2 full days in Smokey Mtn NP. Also arrived early enough to do some NP stuff that first evening.
Day 8 went to a TN state park near Linden, TN
Day 9, went all the way to Lake Catherine State Park near Hot Springs AR, this included a 3.5 hour Mississippi river crossing in Memphis with the messed up bridge. We would have diverted 60 miles to a different crossing but wanted to visit my brother in Memphis for lunch. We didn't get much time at this park and want to go back, it looked great. It's an easy trip from Dallas
Day 10 all the way home.