We rarely get snow geese here in Bluff Country but when my son was in school at NDSU in Fargo he would tell of tens of thousands of them when he went hunting with his farming friends in north North Dakota...:)
I'm surprised you don't get Snow Geese. Some years the number of Snows is absolutely astounding. North Dakota is probably very white with them too these days. Fall Bird Hunting in NoDak and Southern Sask & Manitoba is second to none by those who like the sport.