
521 miles, about 9 hours of pure driving. 5 rental brands have a branch at both ends.
521 miles on the fastest route, about 9 hours of pure driving (OSRM). RVs are slower than cars, so plan extra time.
At 4 hours of driving a day that is at least 3 days one way, before any stops. Most people take more.
Cruise America, El Monte RV, Escape Campervans, roadsurfer, Indie Campers have a branch at both ends. One-way availability and fees depend on dates; check on the brand site.