Check for State land/parks by going to Illinois Department of Natural Resouces web page -
http://dnr.state.il/ . I believe that Ford county is just like any other county in that you just aren't going to be able to quickly befriend a farmer or anyone else and have them open their lands to you. I wish it were different, but it's not. I f my memory serves me, I think Ford county is one of those big open counties - lots of farm field and not so much tracts of woods.