In the mid-1940s the park was redesigned to allow for approximately 32 tent campsites along the shores of the Straits of Mackinac.

Around this time, the entrance to the park changed to the corner of Paro and Church street.

In 1975 the decision was made to create the Father Marquette National Memorial, in the park area west of Interstate 75.

The plan called for new facilities at all 5 bathrooms, and updating each campsite with 20, 30, and 50 amp electrical service and a level camping pad.

The popular campsites along the lake shoreline were closed, bringing the number of sites to 255.