You can find some photos of Lake Quinault Lodge here:
We stopped in Forks where the Twilight book series is set, but we didn't find any vampires or werewolves on our trip. Maybe you will be luckier!?
From south to north on 101 in Oregon, consider Carl G. Washburne SP north of Florence, OR. The Cape Perpetua area between Florence and Yachats (Yah-hots) is a beautiful area of the coast, and you can access some nice beach walks from Washburne SP.
Stop in Depoe Bay to see the tiny harbor, and get some clam chowder at Mo's and salt water taffy at the candy shop. You can sometimes spot whales from the roadside there, or take a whale watching tour from the harbor.
In Pacific City, consider lunch and local brews at the Pelican Pub. You can drive onto the beach there if you're feeling adventurous. Don't forget to climb the dune. Cape Lookout SP is a few miles north on the Three Capes Scenic Route.
Stop by the Tillamook Cheese Factory for some free samples and an ice cream cone, but the best lunch in Tillamook is at the Blue Heron French Cheese Company. Great salads and sandwiches and lots of character in an old barn on the north side of town. Eat lunch at the Blue Heron and stop at Tillamook Cheese for dessert. Nehalem Bay as a good spot as previously mentioned. The town of Manzanita has a very nice wine bar, Vino. The hike up Neah-kah-nie Mountain from the south side is not too long and offers beautiful views of the coast. Another great, short hike is Cape Falcon from the Oswald West parking area.
If you like boats, check out the wreck of the Peter Iredale at Ft. Stevens SP near Warrenton and the maritime museum in Astoria. If you like airplanes and military history, consider the World War II air museum and blimp hangar south of Tillamook, or Battery Russell at Ft. Stevens SP.
As for your concerns about having too much of a plan, I took the forum's input on US 395 and just put a bunch of post-its on my map. We hit some and didn't hit others, but all the options sure made the trip fun!