Best chance for trophys definitely at night. Cast big stick baits(husky jerks, rogues etc.) by the dam. You will have to stay north of the power lines because it is considered a fish sanctuary from the power lines to the dam. If you want to go for numbers vertically jig the river channel, lots of 22" to 25" fish in the system right now. Also, don't be afraid to move away from the crowds, and believe me, if you wait for a nice weekend you will be able to walk across that river. I would put in at the mouth of the river, (Metro boat launch)and fish current breaks and warm water discharges. There are hundreds of spots to fish without playing bumper boats. If you put in at Fox Point launch, prepare to fight the crowds and all the yahoos that seem to forget how to lauch a boat over the winter. And you don't need minnows. 3" gulp emerald shiners work great.