There are several options along Oregon’s 363 mile coastline for RV camping adjacent to the beach. I personally prefer the State Parks camping experience (forested, close to great natural areas) to most private RV parks that are primarily paved or graveled parking lots.
A few State Parks offer campsites adjacent to the beach, though not necessarily offering views from a campsite. Beachside State Park between Waldport and Yachats is likely your best bet for oceanfront RV spaces within a State Park. The trade-off is this park is bordered by Highway 101. Two of my other favorite State Parks with campgrounds adjacent to beach access and views a short walk away include Cape Lookout State Park near Tillamook and Harris Beach State Park in Brookings.
There are several other private RV parks that offer oceanfront sites. You could consider Sea & Sand RV Park in Depoe Bay, Sea Perch RV Resort in Yachats, Oceanside Beachfront RV in Charleston, Oceanside RV Park in Gold Beach and Beachfront RV Park in Brookings.