Had a 2 night stay on our cross country trip and it was perfect.  The campsites were well spaced, level, clean, and easy hook ups (no septic though). We took advantage of the trails and did a 7 mile hike on the moderate level.  Low level military jets occasional during the day was the only faint noise, but it's ok … they are always welcomed!  The night was lite by the full moon so we could not see the stars well, but still … beautifully quite. The museum gave a great history of the area and we learned a lot. This was our first time with a Texas park and it was great! Thanks Texas!