I can tell you this... I am in the same boat (what a pun!). I have fished Harris for Crappie for a couple of years now, sometimes a couple of times a week, and cant buy a bite.
I have decent electronics, and can find em, but cant catch em. I even went to the dock at Holleman's, dropped a camera in the water, and watched the crappie stare at my jigs. I tried everything to get them to bite, but they would not. They would hover around it, and stare at it, but they would not bite it. I suspect that's what is happening out on the lake. I was surprised to see as many, and different types of fish right at the fishing dock in 6 feet of water.