Welcome to the JOF! I really like Clear Lake State Park near Atlanta, MI. They upgraded their electrical system last summer, and it is really nice. Holly State Rec. Area and Pontiac Lake State Rec. Area are also great options on the other side of the state. A little closer to your home, Ionia State Rec. Area is very nice. You can see my review in the Michigan Campers & Campgrounds social group.
Happy Camping where ever you end up!