Need Help Finding A Wedding Site.

Hi,
My future husband and I really enjoy camping and the outdoors. This is something that we share and is very specail to us. I am looking for a location in or around the Dayton, Ohio area that can host a wedding for 50 guests. I want something in a park or nature area where I can have a ceremony outside if the weather is permitting or it can be in a cabin/lodge type facility if the weather does not allow an outdoor ceremony. Does anyone have any suggestions?