Hill country state natural area is good. Have you thought about Big Bend or if you really want a challenge the Rancherias trail at big bend ranch state park.
Of course close to home but fairly level are the 4c trail in the Davey Crockett N.F. or the Lonestar?
Another great spot could be the climbing stairs area of Ark. 2-3 day hike with everything???
Glad to see you post and keep us all informed
