Don't know that I can be much help, but it seems your route choice might be influenced by your Washington coast target and your return routing. Most of the routes, as you have probably seen on the map, are anything but straight. I would agree that WA 20 is very scenic; but 2, 12, and even the Interstates have scenic attractions and interesting towns. Crossing Idaho, Sandpoint and Coure d alene are neat tourist and scenic attractions. Glacier is our favorite US park; hoping to get back there this Fall. Watertown Park on your side is spectacular, and I like most of the campgrounds on our side except for the two big ones - Apgar and St Mary. Enjoy, Glenn.
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