We’ve stayed at Mackinac Millcreek a few times. Awesome campground, definitely need to know the campground a little bit IF you’re planning on bringing a very large RV. But if not, call the office they’ll put you in a good spot. Our first time to the campground was pretty funny, the whole camp ground was sold out. But they squeezed us in by the rally building and apologized about it being by the maintenance area. Turn out to be one of the best spots we’ve camped. There was a lot of partying, so it was perfect for us. But the rest of the campground is pretty chill.