My fam and I are going to be in the area of Fairfield ID this summer, and noticed that there is some very dark sky north of there a ways. Not knowing a lot about the area, I'm curious to know if any of that blotch is accessible or suitable for observation.
I camped just north of Stanley, ID for the solar eclipse in 2017. Skies were indeed dark! There are wide open spaces everywhere, plenty of large pull-offs on the sides of the road to set up telescopes. Dozens of campgrounds are located all along the roads in that area, if you have a few hours to spare driving around, you should be able to find something with clear views without too much trouble.
Stanley was an excellent "home base" for that type of thing, it's a nice little town with a few good restaurants and a grocery store.