You are right, you can't cover all of those unless you drive non stop. You could fly into Seattle, then take the Bremerton ferry and visit the naval shipyard. From there do the loop around the Olympic peninsula then head down the Oregon coast. If time permits, head over to 97 and head north through the high desert then back to Seattle.
If you prefer Yellowstone and the Grand Tetons, you could launch out of Spokane. The drive through Idaho to Boise is spectacular. Now go east to Pocatello then north on I-15 to Yellowstone. Don't rush and take on too much. There is so much to see and do, enjoy the journey.
