Billyizme may be confusing plain 'ol ice and dry ice. I am 100% certain that at least as-of now Alaska/Horizon will allow you to fly with 5 lbs of dry ice, per person, in checked baggage.

If that news about ONE checked bag per person is true, starting in June, that is a complete DISASTER for parents (travelling with kids, car seats, etc). Not just fishermen. Seems CRAZY
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The charm of fishing is that it is the pursuit of what is elusive but attainable, a perpetual series of occasions for hope. -John Buchan