Oregon...
Washington's sister to the south. Oregon is I think very underrated. You have beautiful coastlines, old growth forests, beautiful mountainscapes, and a high desert very much worth exploring. The opportunities are endless. Oregon has 6 state forests totaling 745,000 acres, one national park (Crater Lake), 4 National Monuments, and 47 wilderness areas!
If visiting for the first time, I would of course recommend Crater Lake National Park, it is an incredible sight and such a beautiful place to visit. The John Day Fossil Beds is also an impressive place with so much history. And you can't go wrong in visiting the gorgeous coastline. Cape Perpetua Scenic Area is probably my favorite.
FUN FACT: Crater Lake is actually the deepest lake in the United States at 1,932 feet deep. Solely fed by precipitation, as there is no inlet or outlet, combined with the depth make this lake a gorgeous shade of deep blue.
Explore Oregon:
Below are just general resources to help you find your next adventure. This is really just the tip of the iceberg but I hope it helps. The camping listed is really just general campgrounds although there is other options in the area that can be found with a google search and in several books!