The Oregon Coast in October/November is a wonderful time to visit. Like posted before, the rain season starts in Sept and ends in late April/early May.
Highway 101 along the Oregon Coast is slow, as it winds along, but we have taken our 42' Class A along its entire length.
If you can, drive the entire length, from Calif to Wash. Each mile has something different to see, or experience. If you must leave the coast and get to highway 5, then beware that there are some obstacles.
There are tunnels along the side roads, and low bridges.
http://www.traveloregon.com/Explore%20O ... Coast.aspx
http://visittheoregoncoast.com/
Also, there are a lot of great places to eat, and visit. It would take me pages to list them all. From Calif border going North, and I apologize for missing a lot of great cities and stops;
First, stop at the view points, state parks with ocean walks, and historical sites along the way.
Bandon: visit old town and the wharf.
Stay off the sand dunes unless you are careful. There are places that rent 4-wheelers to travel the dunes.
Get off the main road in each of the little cities you pass,
Florence has a great older, downtown section and wharf.
Newport, visit the docks and great areas therein, eat at Sharks.
visit the Oregon Aquarium and Marine center
the Rogue brewery is fantastic for food, if you do not partake of
beer.
Lincoln City, Depot Bay, these are great stops as well.
Going North, just before Neskowin, is Neskowin Creek Resort. Stay there. Walk on the trail down to the beach. Great resort, and great beach.
Swing off hwy 101 to take in Pacific City. Great beach, excellent food at the Pelican Brew Pub, several places to stay in your RV.
Tillamook has a world famous cheese factory, the Blue Heron is a great stop. Excellent Air Museum in an old dirigible (Blimp) hanger. Did you know that the only American casualties on the lower 48 states, from WWII, inflicted by the Japanese, occurred in Oregon? You'll find out here.
Just North is a long wharf, Bay City, where you can see oysters being freshly shucked. Lunch there if you can.
Going North, Girabaldi has a great wharf, Rockaway Beach is a nice town to stroll through.
Cannon Beach is very commercialized with lots of tourist shops, I usually skip this part but you may find something of interest here.
Seaside, a must see, a board walk to walk.
Astoria, again a must see, Maritime Museum, downtown wharfs, big bridge.
Sorry about the long winded response.