We used to just pass shoot them from roost to food. Typically, would just stumble across them while scouting other waterfowl and then change plans for the next day. We always just hid in the fence line or rockpiles and hoped they flew over low enough.
As mentioned, plenty of cranes here in AK. So many that they literally live in the field where my son plays t-ball. Yes, the kids can pretty much walk right up to them. The taxidermist I use has them in his front yard from May to Sept and has 2 dogs. They're like his pets. But growing up in the Midwest (less than an hour from where Kurt is), I can about 99% promise you that you're not walking within shotgun distance of the same bird in the middle of a stubble field. Waterfowl land in the middle of fields, away from rockpiles and fence lines for a reason. Not a chance, we've tried numerous times as kids trying to be sneaky and couldn't do it..........