Hard to say, the ultimate hunts are over flooded crops but wouldn't wish that upon the farmers! I have seen geese take a worked field that has a couple inches of green growth over stuble fields. I enjoy the stuble hunts simply for the fact of ease with blending the layout blinds and with some rain or heavy dew it's still easier accessible with less mud to deal with! The birds will focus on areas with quality and quantity of feed, as for the bird movement working there way south as the season proceeds, it's not as much as a weather issue! My observations have been a time line! It seems like the birds have it in there head to work south even without the cold and freeze up! Haven't had the days of breaking the ice to set up and so on for a few years now! Could just be my area, but seems to be the trend!
Just my 2 cents, maybe couple other members can help out here?