If trolling only the first 2 wks of April the water is still very cold and you need to troll slow enough to catch them.Get some trolling bags and get speed between 1.2- 1.6 mph.Bandits will catch trolling if at right depth.Are you using inline boards or just flat lining it behind the boat? Best way to learn to troll is to go out with charter that trolls.Read trolling posts here and Ohio game and fish too.Good luck.