Do you have any other reservations? How long do you have for this trip? Any kids or just you folks and the dog? Do you have a towed(I assume you do)?
There are about 783,000 posts on this subject and the number one suggestion is do it the other direction if possible.
Newport Aquarium.
Waldport crabbing if in season(free, no license).
Newport Waterfront.
South Beach park in Newport.
Beverly Beach CG.
Cape Disappointment.
Ft. Clatsop.
HOH Rainforest.
Kalalock CG.
Just a few with no other info.
"I travel not to go anywhere, but to go. I travel for travel's sake. The great affair is to go". R. L. Stevenson
David Bishop
2002 Winnebago Adventurer 32V
2009 GMC Canyon
Roadmaster 5000
BrakeBuddy Classic II