I had to laugh about some of the places considered 'in the middle of nowhere', but thanks for the tip on the A & M Cafe at Interior near Badlands. We ate breakfast at the Badlands National Park vendor's cafe (I believe the only place to eat in the park?) a couple of years ago & even Mr. hat attack, who loves anything breakfast related, agreed it was remarkably awful. It is pretty hard to mess up everything on a breakfast plate!
I'm surprised no one has mentioned Doe's Eat Place in Greenville, Ms & Paducah, KY. These are the original family owned places, but I understand they've opened some franchises lately.