Been out today and eventually did a recce on the first bit of the run from Moffat, the actual road to it is shut but should be open by the weekend so did it in both ways as I had to do it initially from the wrong side.
As Muppet stated it is single carriageway and certainly no worse than anything we encountered on Islay last year, it only gets really narrow in one spot, that said I was sitting between 50 & 60 for the most part and that was very comfortable, if the sun makes an appearance I think it will be well worth it and could well be our first photo stop after a mere 20 miles or so.
We'll just need to watch out for the sheep.