I planning a trip in the mountains of central Idaho. It may include small towns like Riggins, McCall, Stanley, and Salmon. Since I'm camping I mostly interested in lunch options, and grocery shopping for the evening meal in camp. I know from experience that finding things like this is hit-and-miss, with a lot of disappointing small town general stores, and the occasional choice find (like my first flat iron steak in Halfway OR, or smoked meats in Twisp, WA.).
Any gems that I should keep an eye out for, and maybe go out of my way to find? I wouldn't rule out passing through Boise or Ketchum for more options, but I'd rather not. Sometimes I've sought out farming towns in hope of finding a taco truck.