Can`t Find Outdoor Wedding Site

I am having trouble finding an outdoor wedding site. My date is August 19, 2006 and I have approximatly 110 guests. I live in Grand Blanc, Michigan (near the city of Flint). I am looking for a site for the ceremony only, preferably on a lake, pond, river, creek, garden, or basically anywhere that is really beatiful and naturistic. I have a vision of a sort of hippie, natuistic ceremoney. I am having no such luck finding a spot and I am starting to panic. I would appreciate any suggestions for a location. Thank you!