We spent 2 weeks on Eilean Shona last June, in Red Cottage.
Small island with no vehicles, shops or anything. About as close to deserted as you’ll get. Our cottage was in the forest on its own but a 2 min walk from the loch side.
Only neighbours were deer, pine martins and a cheeky blackbird, all of whom wandered around near the cottage.
The dog loved it, as did we.
Even the drive to get the boat to the island is pretty cool, a good 5 miles of singletrack road seeming to lead to nowhere.
One of the 3 other sets of guests had kayaks with them and spent most of their time paddling about, would be handy if you wanted to see the mainland too as there are only boats across 2 times a week.
We will be going back at some point….