This might be totally luck, but it might help u walleye guys....
So fished the Friday nighter Friday we had the boat 25-30ft found a large Rock that topped off in 11 ft guessing when the water is at pool it completely out of the water. I noticed a lot of fish on the graph that were suspended. So end up tying on a 6xd crankbait, threw it off and on a little bit with nothing but we turn back around and headed back toward the east so I remembered that rock picked the cranking stick up, and I made five cast and out of five cast I caught three keeper Walleye. Think I ended up catching seven walleye & 2 nice whites off that rock with another keeper eye that came off when we went to net it. I never had that to happen before. But that crankbait had to hit that rock for those walleye to bite it, I threw them both sides The Rock making no contact and I never got a bite. When we got back to the ramp the live well they were in was full of shad they all spit up. Didnt end up with any keeper black bass off that spot. All walleye where caught after dark.
Don't know if any of that info can help you walleye guys but good luck! I kind of reminded me of that deal those guys that bass fish the ledges down at Kentucky Lake do.