My 2 cents on the subject of crappie in Table Rock- I think it's also due in part to lake characteristics. I have gone fishing with my uncle on Sardis lake in Mississippi the last few summers, we spend usually will fish a couple of mornings from daylight until noon trolling Bandit 300's. We can usually put 15 -20 keepers a day in the boat, and we're not working too hard at it - just trolling open water in the 25-35 feet deep range.
Sardis and the other nearby crappie lakes get pounded by fishermen, especially in the spring. Groups of fishermen come from Chicago, and St Louis to fish that lake in the spring. I forget the exact number, but something like 200,000 crappie a year are kept out of that lake, and it's not nearly as big as Table Rock, I think it's around 7,000 acres. In spite of all the pressure it keeps kicking out crappie. Table Rock just doesn't seem to be a good lake for crappie.