Like most Midwestern states, the majority of Minnesota is an unending grid of corn and soy fields. Land isn’t so much land as it is commodity. Inhabiting that landscape tends to be a constant reminder to think in terms of economy. Life, like farming, is a series of inputs and outputs, costs, and benefits. Unlike most Midwestern states, though, things get wilder the farther North you go in Minnesota. Lakes, lots of them, jut in...