I live right by Lake St Clair here in Michigan. It's arguably one of the best smallmouth bass fisheries in the world. Lipless cranks like Rat-L-Tralps and XR50's from Hitek work great for me. My next favorite baits for smallies are 4" tube jigs, 4" Senko worms that are wacky rigged, and white spinnerbaits ........to answer your question rather briefly.
Look for sunken rocks/boulders or weedline edges in a depth of 8.0 to 10.5 this time of year. Your lake may have different structure. The largemouth bass on St. Clair are usually found in heavier cover like grass, pencil reeds, and pads in 2.5 to 6.5 feet of water. Smalles (unless spawning) like slightly deeper water.