Large Outdoor Wedding

Hi! I am looking to get married outside somewhere in northeastern Ohio (Willoughby/Mentor areas). I found one place that`s nice in Geneva, but that`s kind of far away. The problem I`m running into is finding an outdoor place large enough for 250-350 people. I`m also having a hard time finding a good place for my reception that will hold that many people. Any suggestions would be greatly appreciated! :o)