not real familiar with red rock but i do fish rathbun about a dozen times per year. the lake is one of the best walleye fisheries in the area and has excellent catfish and striper-whitebass fishing. crappie fishing can also be fantastic if you hit it just right. i do a lot of trolling for walleye and catch numerous crappie-striper-catfish inadvertently. the lake can be REAL crowded on weekends so i tend to fish during the week-but you can catch fish on the weekends just have to fight a bunch jet skiis and water skiers. if you don’t have a boat the spill ways at both reservoirs have real good fishing at certain times of the year-all dependent on flow and water clarity, etc. hope that helps some and good luck.