ZD,
There is a safek according to one shitah about Alask and that has to with whether the dateline veers around land or cuts straight through. The same is not for Hawaii because the dateline would not cut through a land mass.
You can vacation in Alaska without being there over Shabbos (or safek, safek Shabbos), it is easy enough in these days of international travel.
I think the real issue would be that signs are in Inuit and are understandable b those who speak Yiddish, would be difficult for those who do not line Yiddish.