Thanks for the great suggestion. We just returned from our trip and stopped at Richard's Farm Restaurant in Casey. Appropriately for us, the exit sign was for Casey/Kansas
We had two pork sandwiches - fried pork tenderloin and BBQ pork. The tenderloin had a nice, if bland, coating and was quite large. The BBQ pork was sweet and tender. We especially liked the pecan pie, made at the restaurant (ask first - not all desserts are made on-site). It had a hint of maple syrup with lots of pecans. Even though we ordered one piece to split, our waitress got us two pieces for the price of one. The main entrees were a bit steep in price for roadfood, but the sandwiches were just right.