Update:
Áillon wintered on the big island. There were elks and seals, but no people visited the island. It was a long year. He developed several seal-hunting tactics and made an enclosure for elks. To keep them alive longer. When summer sun finally warmed the waters, he set out to swim to north-east, even when not seeing land in the horizon.
It very nearly cost him his life.(I had no save. Last bits of this swim were nerve-wrecking.)Unable to see properly among the waves, he only could get a glimpse of what lay ahead.
(I was using the map to navigate, since zooming out doesn't work when swimming.)The waters went cold again in fallow month. Áillon had to wait for what felt like weeks for the sea to be warm enough to swim such long distances again.
Finally some bigger islands. This must be archipelago!
A village! Saved!
Áillon hauled some sauna stones in exchange for a board and some food. Then he fashioned a paddle, made a raft and set out to get his stash of furs and half-cottage worth of logs.