OP has a 5th wheel ..... Pacific Shores is for Class A and Class C only.
South Beach (just over the bridge in Newport) has an excellent state park...equal to Beverly Beach. The Marina rv park (as mentioned above) is also a good place; however, no trees or anything else but a good view of the bay and the bridge. I've never seen this park full.
Seal Rock has a nice rv park overlooking the beach/ocean. North of Newport, theres a couple of rv parks in Depot Bay (Sea & Sand), and a small rv park (Fogarty Creek).
Good luck
Ron