We stayed here for 4 nights in early May 2019. We stayed in the Red Arroyo Campground at the South entrance of the park. The best thing about this park is the amount of space between spots. Plenty of space between you and your neighbors. The park is beautiful and very quiet. When we were there the wildflowers were in full bloom. Spots are water and electric only, but there is a dump onsite. We had spot #13 and it was steep, but we were able to tuck our 30ft trailer at the bottom where it leveled out. No levelers required. The park has many trails for hiking and biking. Some of the trails were a bit muddy, but they had recently had rain. Cell phone service was good. We were able to get internet through the hotspot. Overall, it was a nice stay and we would stay here again. $20 price reflects camping fee only. Day use fee is $4 per person if you do not have a Texas State Park Pass.