I travel to Alaska on a fairly regular basis. It’s a lot cheaper to pay excess baggage fees on airlines rather than sending up and/or back any other way. The other nice thing is that it is waiting for you still frozen at the airport. Last trip I paid $50 each to ship 5 x 50lb insulated fish boxes. I bought the boxes at Walmart in anchorage. You can have your fish cut up, shrink wrapped, and speedy frozen in a matter of a couple hours at the better processors.