There are numerous RV parks along California Route 9 right near the entrance of Henry Cowell Redwoods State Park near Felton. It is pretty funny, but a lot of these are called RV Resorts. E.g. one of them is the Santa Cruz Redwoods RV Resort. If you like to RV, you know that resorts don't show up evenly across the map, and you have to seek them out. Nonetheless, despite competition, rates are high (oftne $60+ depending on the time of year), but if you want to get away and don't want to stay in Santa Cruz or San Jose, camping out here (including tenting) might have to do.