Marina Bay RV Park near El Sobrante provides full hookups, waterfront views and a selection of pull-through sites that work well for towable toy haulers and trailers. Mount Diablo State Park offers roomy, scenic campgrounds and roadside pullouts where many RVers park for hiking and summit drives, though hookups are limited. Briones Regional Park has quiet, scenic backcountry and reservable group sites; it suits travelers who want to unhitch for day hikes while keeping their trailer at a designated parking area. Each option gives a different balance of hookups, space and scenery for trips staged from El Sobrante.