Each year is different,mainly depends on the weather.I had been fishing with a guy that preferred to cast on the reefs in the fall.Typically by mid Sept we would start catching them on gull and on the east side of Pelee.So we didn't troll much from mid Sept thru mid Oct.But by mid October he would move his boat over to Huron thru the first week of Nov.Some years the fishing was good off Huron,other years the bite was better later into November.As the water cools the fish head west and stage off Huron in late fall and early winter then head to reefs in late winter to spawn on the reefs in March.