I finally managed to contact the Rathdowney number last week and the lady gave me another number of someone whose family owns the private property. I tried this number a few times without success so called Rathdowney info centre again and this time spoke with the lady I had been trying to contact as she also works at the centre. She said Mt Ernest could be reached from the Mt Lindsay end by crossing the property but wasn’t familiar with any tracks from that end and couldn’t give permission to access the land at the Yellow Pinch end. I have now given up trying, and last week took a drive to try and find a route via the Burbank campground and think I found a fairly straightforward route. I crossed the creek then headed south east towards the end of the snig track and continued until I came to the NP/Private property boundary fence, from there followed the fence south until I reached the ridge that leads to the summit. That is as far as I went but it looks pretty straightforward from there, also the fires seemed to have cleared out a lot of undergrowth as the lower section is fairly easy going. I am now confident and looking forward to doing the walk sometime towards the end of the month.