This is a well maintained Jellystone park located in New Braunfels, TX.  We have gone twice and had a blast each time.  The splash pad and water slides open at 1200 and my 6 year old had a lot of fun on them during the summer.  The bounce pad is very nice,  The indoor pool is great in the summer, when we went in February the water wasn't nearly warm enough for my liking.  

The sites are close together but many have large trees to help shade the area.