Hey, Dick.
Sounds like a fun trip. Michele and I have done similar routes over the years. Never in the Cobra, though. Sigh, I'm jealous.
In any case, here's some areas we've really enjoyed.
In WA, take the northern route (20) through the cascades. Wow. One of the most beautifull roads I'v eve driven on. Be prepared for rain there.
Out on the west side of Mt. Olympus, we went through the rain forest.
AFAIK, the only rain forest in the continental US. We took a boat cruise on Lake Chelan. That lake is something like 2,000' deep.
Southern Utah in the capital reef area. Beautifull roads and scenery. Some of clearest air in the US. Last time we were headed for vegas on the harley, and went through paige. Also took in Bryce Canyon, the pink sand dunes, and Zion NP. Zion was great, as the road in travels through the cliff. That was really cool.
In CA, we drove to Reno (for the WSCB), and then south to Yosemite. That was impressive.
Then we cut across the state to visit Hearst Castle. That is a must see.
Then up Hwy 1, across the Bixby Bridge, and into Carmel. Spent a little time on Cannery Row. Then across the bay for lunch on the pier. Then into SF.
I love SF. One of my favorite US cities. Best seafood anywhere. And we found a little sicilian trattoria on columbus street that's worth the trip all by itself. There's a place on Pier 39 called The Crab House. They make a dish called Killer Crab. And it is. Scomas was pretty good, too.
Across the bridge is Muir Woods. Huge trees. Almost like a rain forest. After that head north along Hwy 1 again. It's kinda like a roller coaster up there. Michele got pretty car sick.
The Napa Valley was kinda cool, but not a Must See in my book. I didn't see one auto parts manufacturing plant there.