Well...........I don't know about Cumberland State Park, but I can tell you this.......Dale Hollow State Park and Barkley State Park have a very good buffet. And it is not nearly that expensive. Last Sunday, we at at Barkley on the way back because we were tired of fast food.
The roast beef was off the look. as was the sweet potatoes, and fried chicken.
Sorry you had a bad experience, but that "crappy" food was pretty **** good ........And we ate for less than 9 bucks per person. I tipped really, really good ( 5 bucks), so my total was about 14. For Shitty food, that was well worth it.
Later,
Geo