Wedding Locations

My fiance and I are planning on getting married in September 2006. We want a non-traditional wedding, and were thinking of marrying in the Metroparks. We love the Metroparks, but I`m unsure of what a good location would be, especially if it rains. Does anyone know of good Metropark locations (we live in Parma and have family in Willoughby), and who would we contact to reserve the location? Thanks