We spent 4 days and 3 nights at Garner State Park in Texas, where we camped, hiked, and swam. It gets VERY crowded on the weekends - so go during the week if possible. There are lots of interesting and scenic hiking trails - please use caution, as you are up on high cliffs (at times), with slippery rocks galore. The Frio River is my favorite river in Texas :D. There are many places up and downstream from Garner State Park to stay along the Frio River. The scenery can change dramatically, so check out as many miles of the river as you can :D.