Mr Dux I went to lake Ouachita in Arkansas on 8/3/16 trolling walleye crawler harnasses with huge night crawlers. We were trolling 1mph using BOTTOM BOUNCING WEIGHTS in 25-35fow on humps in the lake that quickley would drop off over 75fow. We did catch some walleye but not many but we WORE the dang bluegills out man! Tellin ya that to say this.....I would not be scared to troll for them in that depth of water and flat down on the bottom just to locate them. Once ya find em change methods and capitalize on em! I would downsize some but can cover alot of water trolling. I could see them on my graph but until I caught one I didn't know what they were and bream would have been the last thing I would have thot they were. And now I know where they are I bet i can go back to them and drop shot em! That would be a blast! Good Luck!