I live in WI and I have take geese with my bow. It is legal and it is not all that difficult as one might think.
The first time I did it was on a Deer hunting trip and as I left my stand mid day I had a low flying flock coming my way. I was hunting with my recurve and I knew I had a safe drop area for the arrow if I missed and I let fly. Granted I was aiming at the first goose and hit the third but I was just as thrilled. Since then I have taken several more, mostly decoyed into a field on my brothers land and taken on the ground from a blind shortly after they landed. They as you all know have sharp eyes and present a small target but it is fun.