There is a reason that birds fly south for the winter, and north for the summer. Alaska receives less energy from the sun per square mile than the equator does, and the sun is what keeps this whole world going.
The closer to the equator you go, the more critters you see, and the more there is for them to EAT. Ducks go north to raise their young because there are fewer predators and they are more spread out. The predators have to cover more ground in Alaska to find food than they would in Louisiana. Therefore, the odds are better that a flock of ducklings would avoid detection the further north they go.
This all means that it takes a lot more work to stay alive because you have to cover more country and take longer shots and plant more vegetables and burn more wood than you would in other places.
I lived in Point Lay, Alaska for about 6 months. It's a little point where the eskimo people have hunted beluga whales for generations. Long ago, someone discovered that when the tide goes out, those whales get landlocked and can be easily killed. I was there for the annual whale harvest, and saw them kill the food that has kept them alive in that one place for generations. Why haven't their people gone somewhere else? Because once they leave that little point, they don't have enough food to stay alive. Caribou come through from time-to-time as well, which provides the other part of their subsistence. [Of course, this is different now, because they have most of their food flown in from the Fairbanks Wal-Mart nowadays!]
This is super-extreme example, and this is one of the hardest places to live in the state. But that bush life is hard, hard work, and the margin of error is very small and unforgiving.