Click on 'U-Pick Farm' at the top and find your state.
I was just on this website last night to find the link to my great aunt's website again (never did find it on that site though). She owns a U-Pick several hours north of us that we try to visit each summer. I sure do love blueberries though, and going up there, Northern MN is so pretty.. Did you know that eating blueberries helps prevent memory loss and alzhiemers? Atleast I think thats what I heard..
Have you tried looking on localharvest.org? Upick farms should be listed there. Hope you find some!
Found this too but I don't know if it's your area of Ohio: http://www.pickyourown.org/OHcolumbus.htm