Roger,
Going up/down the Oregon coast is a favorite trip of mine. You will have some great camping spots, that's for sure. Starting at the CA/OR border, the following state parks are exceptional: Harris Beach (Brookings), Bullards Beach (Bandon), William Tugman (Winchester Bay), and Beverly Beach (Newport). Exceptional RV parks:
Marina RV Park (Winchester Bay),
Hecta Beach RV Park(Florence) ,
Sea Perch (Yachats) and Cannon Beach.
Every one of the above are just plain sweet. Tugman is nice because two loops are first come first serve, which means if you arrive on Thursday, you will have a campsite thru the weekend without having reservations. Otherwise, reservations for weekends are a MUST. Have a great summer trip, Roger, and see you in October.