If you are looking for lots of hiking and mountain biking in the beautiful Texas panhandle.  2nd largest canyon in the U.S.  Great amenities and a well cared for state park.  We spent 5 days there and still didn't get to cover all the trails and sights.  Plan to go back.  We went in April to beat the heat, but it was still pretty warm on the trails, near 90 in the days and high 50's at night.  Next trip will be likely in the fall (October-ish).  All the trails warn to bring water and they mean it!  Lots of wildlife; deer, hogs, numerous birds, reptiles.  Sudden storms can pop up and bring quick winds and rain, so be prepared!  Sites are large, but not isolated from each other (not many trees), so be ready for some openness.  Flat pads with good water and electric.  There are numerous primitive tent sites and some pack-in sites as well.  Park store is run by a 3rd party vendor, so Texas Parks pass doesn't give you discount, but the store is large and has bistro-type eating.