Alaska wasn't a state yet, but it was part of the United States and thus federal law applied there.
Moreover, Alaska passed its own alcohol prohibition laws before the nation-wide prohibition.
Moreover, Alaska passed its own alcohol prohibition laws before the nation-wide prohibition.
In fact, there is a pending Supreme Court case related to this in which a pilot's airplane was confiscated when his passengers were discovered with beer in one of those places: https://en.wikipedia.org/wiki/Jouppi_v._Alaska