What area of Wisconsin is he from again? I spent a lot of time in Wisconsin when I was young. I'd like to see how close he grew up to farmland. (NY guess is pretty close, based on my knowledge of Wisconsin.)
I think we do things based on what we know as well as where we are. So although he was living in the city, he may have been more comfortable disposing of the body in the country for various reasons. First, it's obviously less populated and close - 15 minutes and there are vast fields of farmland. Second, if he grew up near farmland, just in play as a child he may have been aware of all the great places to hide. (I grew up on Main Street but we played in corn fields nearby, including barns when we could get by with it.) Third, if his drive back to Wisconsin took him past fields and barns, he would be very aware of what was available on that repeated route (and I mean closer to Champaign than WI). He may have even daydreamed about doing stuff like this while driving, and thought, well that might be a good place to go...
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