Book State Parks on-line here:
PRO TIP--Reservations open 9 months ahead of the day the spot is available. If you plan to stay in a particular state park, RESERVE AS SOON AS YOU ARE ABLE! All are pet-friendly if your pet is on a leash.
Working south to north...
Sunset Bay State Park in Coos Bay is right on the ocean. The park is sheltered from the wind. As you leave the park you can look out in to the ocean. Also, Shore Acres State Park is just up the road--well worth the time to go see.
Beverly Beach State Park north of Newport is right on the ocean. Highway 101 goes right over the opening of the park. You walk under 101 to get to the ocean. You can see the ocean from the ranger's station at the front of the park. Loop A or B is right next to the ocean and you'll probably get tired of the constant wind. We like to camp in Loop D or higher.
Devil's Lake State Park in Lincoln City is nicely sheltered from the ocean. You're able to walk down the D River (World's Shortest) to the ocean. It's about a half-hour walk, but it delivers you right to the ocean.
Cape Lookout State Park in Tillamook is right on the ocean. The road to the park is bumpy to say the least. It's built on sand and, as The Bible tells us, that's not the best place in the world to build. The park is next to the ocean. Loop D or E get our vote for being sheltered and in the trees. Loops A or B put you right next to the beach where the wind will blow all day and all night.
Fort Stevens State Park in Astoria overlooks the ocean at the mouth of the Columbia River. That is so important of a site that the government built a fort there to defend the river opening. You will be able to tour the fort with disappearing guns and magazines. The last time we were there, an antique military group was meeting there. It really gave you the feeling that WWII hadn't quite ended yet!. The fort, by the way, came under fire in WWII making it the only place on the US mainland that came under fire from the enemy during the war.
There are lighthouses along the way--I strongly encourage your stopping to see them. Many are open only in the summer and are usually free. Each is different.