Do you love big bluegill?
After spawning, they will want to serious feed. Your waters near where you live have serious resources for the BGs to forage. As David suggested, search the weed lines for insects and shrimp feeding, drop-off zones since they will migrate along this area, and structures because they are vulnerable during heavy foraging.
When hunting for the big boys, anything that create plenty of vibration in the water will attract them, including the larger predation species as well. Northland jigs have propeller spinners incorporated into the jig's designs. LedHed here utilize the same methodology for his boilie design. His Auto-jig is bar-none top designed for attracting and hunting gills. David utilized spinners, among many masters of artificial with vibrational devices, to land gills that are hard to get.
However, nothing beats the old fashion live wiggling juicy worm on a hook, under the bobber, with no weight. Of course, having a fishfinder will up your chance of landing gills as well.
By the way John, since you're in the MI areas, what's the water conditions up there? You're practically at the mouths of the greatest tributaries of brackish water for the inland areas.
I tie "mini" crawler harnesses using two #6 hooks. The color beads used is of course variable, but red and white have been good. I use small blades, and a variety of methods of getting them down to the fish, including plain old spilt shot. We often wind drift with a pontoon, and catch good gills between 6 and 20 feet this way. Bonus catches are common, including walleye. That has kept the mid to late summer productive for me!
That oughta do it!
John, When the water here in the south gets hot, I have good luck fishing banks with rock ledges that are totally vertical to the water. I fly fish and use a ten foot leader of 4lb florocarbon with a slow descending wet fly that I toss right up against the rock bluff. Usually by the time my leader disappears I've connected.