By Brian R. Brown Guides Trick-or-Treating Hours & Trick-or-Treat Tips 2023 Grab your costume and your treat bag! Before you head out though, be sure to check our annual McHenry County Trick-or-Treating hours list for your local treating times and events. Cary, Harvard, Wonder Lake, Huntley, Hebron, kids, Woodstock, Holiday Hills, outdoors, family, Island Lake, guides October 12, 2023