My favourite fish... They will be roaming up shallow at nights as troutddicted stated, I would focus your efforts in the 15-30 foot of water. Look for plateauing rock with gravel (whether that be a point or hump), also the mouths of creeks can be very good ambush points for them. They are putting on the feed bag now trying to bulk for the fall spawn and winter monthes, my favourite lures being little cleos in the 1/3ounce size, vibrax spinners in size 2-3, we actually caught a fair number of them this spring on the rapala scatter raps however I dont think you will be able to get deep enough with those.
To be honest at the end of the day live minnows will generally catch you the most fish, this just requires finding the fish.