Frank G. Bonelli Regional Park near South San Gabriel offers lakeside RV camping with designated loops, some water and electric hookups, and easy access to boat launches and picnic areas. Castaic Lake RV Park is a full-service option reachable from South San Gabriel with pull-through sites and full hookups for more comfortable longer stays. For a mountain setting, Crystal Lake Campground provides shaded sites and nearby trailheads; many drive-up spots can accommodate a small micro trailer for a rustic experience. All three choices provide straightforward parking and setup so towable travelers can park their trailer and explore the area around South San Gabriel.