Not a clue wher Lake Simcoe is, but I assume in Michigan. As for rigs to be using, perch LOVE jigging spoons. My personal favorites are the blue and silver kastmaster and firetiger buckshot spoon. Tip them with a minnow head, jig them a few inches off of the bottom, or whereever your flasher unit shows the fish to be. The also like a live-bait rig, if you can get a school under your holes and keep getting bait down to them, you can generally keep them there for a while. Good luck, let us know how you do!
Selmer