Barrow, Bethel, Cordova, and Yakutat come to mind. If it’s winter time I believe you could include a few airports in SE AK. Delta flies to some of them but only in the summer. There are some 135’s flying around but no other 121’s.

Getting around as a passenger would be a little difficult if Alaska were to go on strike but I imagine Horizon would be subbed in fairly quickly. Alaska is already trying to move all the intra Alaska flying to them anyways. There are other true regional airlines that would likely start temp service if it was needed.

Nobody would starve as multiple cargo carriers operate in the state and regularly haul food and mail to everywhere Alaska flies.