Terry
As others have mentioned you don't want to travel Route 1, NOT FOR MOTORHOMES. Last summer we picked up US 101 north of San Francisco and drove it all the way to Astoria, OR (northern border of OR). Easy driving without any concerns. Many great places to stay and see. For the most part we drove 40 miles and parked 3 nites. Did lots of sightseeing and eating oysters.
Some of our memorable campgrounds along the way were Mad River Rapids, Arcata, CA, Shoreline RV Park, Crescent City, CA, Charleston Marina & RV Park, Charleston, OR, Winchester Bay Marina, Winchester Bay, OR and Pacific Shores RV Park (Outdoor Resorts), Newport, OR . Russ has also stayed at the Newport Harbor RV Park-right next to the Rogue Brewery and it's distillery ;D. He liked that also. if you stay at Crescent City, it is downtown on the ocean, get a site in the first row, you are facing the ocean without obstruction.