Campsite 121 at Texas' Guadalupe River State Park is a first-come-first-serve camping area with 33 campsites nestled in oak trees near the river. The campsites accommodate tents or RVs up to 20 feet, and each site includes a picnic table and fire ring. The surrounding views offer scenic landscapes, nature trails, and river access for swimming, tubing, and fishing. The park also has playgrounds, picnic areas, and a nature center. The best time of year to visit is in the spring or fall, with average temperatures ranging from 60-80°F.