I don't think about that trip every day but I do remember it. It came up last weekend because Dau.II came back from a week in Ullapool with the aforementioned Boy and his family. And the allllmost made a day-trip of it. It's 50 miles drive from Ullapool to Durness, so you'd return to your digs at the end of the day utterly clapped out without ever having to walk more than a few steps. When we were there, the lighthouse was still crewed by the Northern Lighthouse Board but the system was automated in 1998. Currently, some of the buildings have been leased to Angie & John Ure who run the Ozone Café and Bunkhouse. Everybody has a positive word to say about the Ozone!
If you are ever in Durness, you have to go to Smoo Cove next door which is like Stradbally, down The Déise, on steroids. It is a long [maybe 300m] thin [maybe 30m across] deep-water inlet which penetrates the landscape as Smoo Cave under the 'main' road. Smoo apparently means 'hidden' in Old Norse and it is easy to imagine a longship nipping in there to avoid pursuit by Ivar Iron-nipples
(*) ne plus ultra?: Parnell's monument apparently has a spelinge errur. Who knew?