In reply to Catriona:
I took a walk up Meall nan Eagan 2 or 3 years back, and continued on to Creag Doire na h-Alchlaise. Admittedly I was in the snow, so hard to see, but I don't remember crossing anything resembling a path - it was just thick heather and bog. I'd imagine that the line of the path is long gone across the highest point, and it would have been a bit of a bike carry to get over.
That was just before the new pylons went in though - the situation may be a bit different now, as I know there is a new access track approaching from the west to that area.