Hidden Villa Campground in Los Altos Hills has group camping and limited vehicle access, making it one of the better on-site options for trailers that can fit into designated spots. Windy Hill Open Space Preserve provides scenic settings and trailhead parking for self-contained towables, though there are no hookups and sites are day-use focused. Monte Bello Open Space Preserve offers ridge-top scenery and primitive camping opportunities; it’s best for trailers that can unhitch and operate self-contained. If you need full hookups or pull-through sites, plan to reserve a nearby private RV park in advance and use local preserves for day trips.