Davis Mpuntains is truly amazing. A great blend of high desert mountains, endless night skies, and incredibly friendly people. I stayed in a tent site (#69) on the end of the loop, as I thought the park would be crowded. But, to my surprise, in early March, it was not! There are sites with full hookups, hot showers, many many hiking trails, and even free Wi-Fi at the headquarters/park entrance! There is little to no cell signal (Verizon) anywhere in the park, except along the Skyline Drive, so be prepared with a booster, or, for a great escape! Excellent park :).
Tent sites are $15 a night, and, if you are a TX parks pass holder, you get half off your second night, and free admission to the park (admission is also charged in addition to camping fee if not a pass holder).