I remember Omak
I probably gassed up at a pump that you used in Omak; as I recall, there were not many businesses in that burg. Later on, the Canada Customs fellow asked why I chose to cross the border at Osoyoos. A number of answers came to mind, some of them notso good, such as, "I figgered you hicks wouldn't search me for drugs." but I held my tongue and shrugged.
One other scenic road I chanced upon in central Idaho proved to be a real treat. US 93 closely follows the turbulent Salmon River, and downstream means north. Lewis and Clark had a look at the Salmon River, and bypassed it because it was too fast to be usable in either direction. But the scenery is terrific, and the valley varies in width considerably.
As I recollect, US 93 is not really an efficient route from hereabouts to Coeur D'Alene, but if you seek scenery, it may be worth the extra miles. I was merely taking Peter Fonda's advice when I wandered thataway -- he really admires and enjoys the Bitterroot Range that forms the Montana-Idaho border there.