No special access issues
It couldn't be much simpler: park at the Gwern Gof Isaf farm and pay the £2 fee at the farmhouse. Follow the old roman road towards Tryfan (the big sticky uppy mountain) marked Caseg Ffraith. Almost immediately you will see a climber's club hut on the left. Follow this almost to it's back door, go through the two gates in front of you to reach the main bloc.
The outlying routes can be found further up the hillside past the obvious crag.