Friends of Wolf Lake
Friends of Wolf Lake (FOWL) is a 501(c)(3) nonprofit whose goal it is to "practice and promote the stewardship of Michigan's natural resources through education, conservation and management by utilizing interpretive programming, outdoor exploration, exhibits and displays." They help provide the Wolf Lake Visitor Center with the resources necessary to not only maintain the programs being offered, but to improve them and add new infrastructure.
Interested in joining? See the "Information for Prospective Board Members" document.