Get landowner permission. Use large decoy spreads. Pass-shooting from fence lines also works well, especially if there are weather conditions keeping birds flying low. Remember, no one benefits if you shoot at birds that are out of range. I've heard they are not good to eat.
Snow geese make excellent table fare.
You can use them with your favorite wild bird recipes. They make especially good sausage. The most common mistake that people make when cooking snow geese is overcooking. Snows are smaller than most Canadas, so adjust your cooking times accordingly. Access to their breeding grounds for most people is not an option.