This is absolute heresy and doesn't make sense for Alaska---or most places---but depending on your age, whether you're gunning for the pot or the outdoor pleasure, it would be a 3-inch 20 o/u. I don't know if SKB is available now. It's light for a day's roaming and I use it mainly for grouse and ducks over decoys but when the geese intrude I shove in three-inchers and the results are satisfactory. Over hill and dale and through the swales with a 12 is no picnic.