Wouldn't you be moving right into where the next large wave of infections are already starting to show? Those states are full of exactly the kind of right wing Luddite who can be depended upon to do the wrong things. That said, you could pick worse places to live so long as you don't have high expectations for an enlightened community.
I lived in Idaho for about 10 years. Loved the place. Loved the people though they are backward in many ways and very conservative.
Personally, I wouldn't live in a small town anywhere in Idaho, especially the lower eastern quadrant because those areas are dominated by Mormons. Still, though, if small towns with decent medical infrastructure is your objective, Cottonwood and Grangeville are nice.
Avoid: Lewiston (!!!!), Twin Falls, Idaho Falls, Pocatello, Nampa, Weiser, Moscow
Might be good: Cascade, Sun Valley, Coer d'Alene.
Boise was my home town when I lived there. Wonderful place, IMO. Very conservative compared to Western Oregon but it is Idaho's most liberal "city" (there are no large cities in Idaho). My sister in law was a nurse in the oncology department in Boise's hospital downtown and she really liked working there. Boise might be larger than you are looking for, the metropolitan area sprawls across several towns and cities with an overall population of about 400,000.
Two quotes that stick in my mind from my days there:
"if salmon were endangered you wouldn't find them in cans in the grocery store"
"if we didn't pay them so much, we wouldn't have so many of them" (a congresswoman from central Idaho said that about Idaho's state employees, about half of whom were paid so little that they qualified for food stamps).
Butch Otter is governor (yuck)