Good luck, we just returned from a similar trip.
Usal is very nice. Head in from the south and Hwy 1. From Usal north follow the road out of camp that heads more north towards Shelter Cove. There is a REALLY nice campground along that route as well (I will check the map for the campground name). Then you can head along the King Range road back out towards the historic town of Ferndale, where the only gas station in town is still full-service! A cool town to walk around and check out.
The drive from Usal to Ferndale is doable in one day, it would probably take about 5-6 hours depending on hour fast you drive.
Like KC said, Bandon is super-cool. Stop in for fish-n-chips. Get some smoked fish. Ahhhhhhhh... There is a really good coffee shop just along side Hwy 101, north of the main entrance to town. Oh, stop at Misty Meadows for some Jam.
Oregon coast. Whaleshead Beach is nice to visit. Check out Humbug State Park/Campground. Also Cape Blanco Lighthouse, the only one on the coast you can go up and see the actual lense, the campground is really nice as well. If you follow Hwy 101, you will see signs for the Bicycle route, follow these when you can, it's a more scenic route.
Astoria was a neat place to hang out for a day and explore from there.
I will check my notes and find the names of more places for you.
:archaeolo