Discovery Bay RV Park offers full hookups, level pull-through sites, and easy marina-side access that simplify arrival and setup for larger rigs. Brannan Island State Recreation Area has spacious waterfront campsites, boat ramps, and RV-accessible sites that are popular with towable setups. Both locations are close to Highway 4 with convenient access roads and room to unhitch for day trips from Discovery Bay. Book ahead for peak season to secure a site sized for your fifth wheel and to confirm available hookups.