I typically troll Bandits in most of the same areas I would be looking for crappie in the winter time, along secondary channel drops or main channel ledges that have scattered cover. I catch most of my summer fish CLOSE to cover but not right in it. Look for suspended schools of crappie in these areas holding right under bait clouds. I think speeding your presentation up over spider rig speeds triggers a reaction bite. I run 1.5-1.8 trolling Bandits. Current will be your friend in the summer.