As Viki is not around at present I will respond (subject to correction in due course) - as far as I know nothing that has been reported to us since the original helpful response from the NP office. I was there but not activating and actually on my way down (to collect a friend abandoned on the way up) when dogs, quad and farmer arrived. I doubt the change in name will make any difference to him.
We had previously activated the hill twice without incident - once together and once each separately. This time we came from the Cadair Idris Pony Path carpark via Gwernan Lake so we were not provoking hostility by going through the GOMLs farmyard.
With regard to that:-
there is actually no immediate ROW link between the Access Land and the ROW path through the farm. This problem is quite widespread - there are several bits of AL in Herefordshire that I have looked for a legitimate access route to and I recall from long ago a broken link from a path in the Brecon Beacons to the nearby road.
BTW there are actually two Craig y Castell labelled on the OS maps - neither of them the 321m one. One is about 700m to the SW of our 321m and 70m lower. The other about 1200m NNW of our 321m and probably about 30m lower - all within the same area of Access Land.
73,
Rod