I don't crappie fish that river, but fish a few creeks off the Ohio. I catch fish pretty regular vertical jigging just the same as I would at any lake. The fish hold in laydowns, stumps, ledges, just like anywhere else. I have noticed, maybe just pure luck. But when finding crappie in a creek or river system, they will be stacked up pretty thick, and if you can catch one, there will be more to follow.