Do you mean coming in from the Sma Glen? The only time that I have been in the Glen was in the fifties when I was still in school.
We camped down in there close to a farm and I do recall seeing a post van delivering mail to the farm....so I guess the wee road was fine?
The only time that we went to Creagan na Beinne and its 'wee ronnie' neighbour was from the North and travelling in from Loch Tay. On that occasion we dropped down to Dunan but it was winter so didn't see much of the top part of the Glen.