I've not actually been to Ellidaey, though I've been close. Likewise to an even more remote and challenging island, Boreray in the St Kilda archipelago away to the west of Scotland's Western Isles, on the edge of the continental shelf. Amazingly, there's evidence of Bronze Age settlement on the island, and pretty continuously since, with parties of men going in summer and scaling the cliffs to net the birds that were the main diet of the people of St Kilda (as of many in Iceland), until the islands were finally depopulated in 1931. There's even a (very rare) Boreray sheep-breed, distinct from the Soay breed from another small island in the group - both descended from ones introduced by the Vikings.
https://en.wikipedia.org/wiki/Boreray,_St_Kilda
View attachment 1538138