your all correct about the Sheridan docks, while there scouting, a guy told me about a marina on grand is., down the st. from anchor marine on ferry rd. I went there last sat. morn and killed on the minnows, there beneath the docks and unloading ramp. decent size in the mid. range, went to sp that morn. and killed on the perch, 75-100 between 3-guys. and 2-30" inch walleye on a perch spreader of all things.you could see the pk. from the launch.