If you've got the time, and Forks is on your itinerary, you may consider visiting Shi Shi, (pronounced shy shy), The Hoh Rainforest, and Cape Flattery. There's camping close to Neah Bay at Hobuck Beach on the Makah rez.
And to add to Bdiver's recommendations. Research Wind Cave National Park, and lodging at Hot Springs in South Dakota.
YMMV
If you're visiting those spots, Hurricane Ridge is also a nice motorcycle stop, with incredible views of the Olympic Mts. The road to access comes out of Port Angeles, WA.