Serrano Campground at Lake Gregory features accessible campsites near the water and large loops that accommodate towable rigs and day-use parking. Heart Bar Campground in the national forest provides a forested setting with spacious sites and drive-in loops suitable for larger trailers, though hookups can be limited so plan ahead. For full-service RV needs, Lake Arrowhead RV Village offers pull-through sites and utility hookups in a quiet, wooded setting close to local services. Before you go, check size limits, road clearance, and reservation policies to ensure your fifth wheel fits comfortably at your chosen campground.