I think I might have posted this last year, but since I can't remember, nor do I expect people to dilligently search my archives.
I stumbled onto a website listing places in Northern Indiana by county where you could pick your own produce. It's moderated by one person, and they rely on others to keep the info current.
Last year I went to this place called Annie's Orchard (listed on the site) in West Lafayette to pick blueberries. I think they are only a few years old, since their blueberry bushes were pretty young. But it was a fun time and I am hoping to come back. They have cherries and peaches as well. If only I can find a place to get strawberries.