All of it!
The OR coast is awesome! Be sure you save a couple of days to also head into Northern California to visit the Redwoods.
We particularly like Bandon Oregon, there are some nice beaches with a lot of tide pools. Look for a restaurant called The 3 Gables, right on the ocean. The owner is a real doll, her name is Mary Yee. She is the owner, hostess, waitress and cook!
There is a nice campground in Southern OR called Cape Blanco State park. It's got a lot of amenities and an awesome view.
Port Ordford is a neat town. As you head into town on 101 look for the arrows painted on the road that point to something called "Scenic view" or something like that - it goes to a neat little harbor overlook.
Plan several days to make the drive up (or down) the coast. There are many, many State Parks and scenic overlooks. Every one of them is worth stopping.
Oregon has some of the nicest state parks in the country!