Sounds beautiful. There is a local folklore about the Blue Men of the Minches. Sea kelpies, their presence is between Lewis and the Shianti Islands I think. You have to offer them the next line of a verse if they start following your boat.

https://en.wikipedia.org/wiki/Blue_men_of_the_Minch

Good book by Nicholson on the Shiant islands, called 'Sea Room' though of course because these islands were bought by the English upper class in their day rather destructive of local life.