In Veni, vidi, vici style, here's my report:
Went wandering north past Celina to the end of Hwy 289, turned right left onto Hwy 56, turned north onto 91. Saw several small towns. Only one restaurant. Ate there: Gas Station Cafe. I was the only out-of-towner. Came home making up my route as I went. Made it home.
(I made it up to Sadler, TX--over 50 miles away. I ate in Southmayd, TX.)