Temperatures are typically mild along the Oregon Coast in November, so only on rare occasions do you need to worry about ice or frost on our roads. This is the rainy season on the coast and it can rain hard and be windy, but the Oregon Coast is spectacular anytime of year and many people come specifically to experience the weather and stormy seas.
There are several State Parks that offer year round RV campsites including Cape Lookout State Park (close to Cape Meares Lighthouse), Beverly Beach State Park (near Yaquina Head and Yaquina Bay Lighthouses), Sunset Bay State Park (near Cape Arago Lighthouse), Umpqua Lighthouse State Park (near Umpqua River Lighthouse), Bullards Beach State Park (near Coquille River Lighthouse) and Cape Blanco State Park (near Cape Blanco Lighthouse). There are also many private RV parks that remain open year-round.
The Heceta Head Lighthouse north of Florence is undergoing an extensive renovation and it is currently completely covered, but Carl G. Washburne Memorial State Park nearby is also open year round for RVs.
Visit the Oregon State Parks website to look into the RV facilities.
Hope this is helpful and happy exploring!