Overview D.H. Day Campground is located in the northern district of Sleeping Bear Dunes National Lakeshore, on the lower peninsula of Michigan.ย This rustic campground is one of the most popular in Northern Michigan and is open (weather permitting) from April 27 through the last Sunday in November. Reservations are required May 1 through October 15. Campsites are within walking distance of the Lake Michigan shoreline and a short drive to many popular features in the park. Summer temperatures ran