Trolling crankbaits with lead core at 2.1-2.4mph over mud basins has still been effective. Troll to cover water until you mark multiple fish at once. Then, turn around a slowly roll a minnow on a lindy rig at .5 mph through them to get the most out of small schools. The trick is to be vertical with 3/4 to 1-ounce weights and 5 foot leader while dragging in the mud to draw attention. All the cleaned fish are full of bloodworms, so they are still actively feeding over the mud, but as water temps cool in the coming week. Look to the shallow jig bite to heat up.