They can always eat seal, whale meat and fish. No !!
Necessity is the mother of invention.
I live within 100 miles of arctic circle, grow over 2000 lb taters, 800 lb carotts, all the cabbage, beets, beans we can eat; and wifey put up over 100 gallon bags of brocculli this past summer; living like kings. Got all the salmon, burbot, caribou, and moose we can eat for 2 years in the freezer too.
I think I would be more worried about the social caliber of people where I live than the availability of food? If I lived in Iceland, all those hotsprings, I'd have greenhouses with orange trees and tomatoes inside.