According to reports, Yellowstone National Park has the most RV sites with full hookups (electricity, water, sewer) in the US National Park Service system. The Fishing Bridge RV Park offers 310 such sites, far more than other popular parks. In 2025, Yellowstone recorded 37,261 RV overnight stays. The campground operates only from May through October.
In Brief
Yellowstone National Park's Fishing Bridge RV Park offers 310 full hookup sites (electricity, water, sewer), the most in the US National Park Service system. The park recorded 37,261 RV overnight stays in 2025.