Hi Stephen,
I have seen your queries on my post regarding Richard Evans of Llanedwen and thought this a more appropriate topic on which to reply to you. I don't have answers to your questions but.....
There were 2 Crown Ferries in the vicinity - Moel-y-Don and Tal -y Foel (plus several others on the coastline). if you so wish, you can update yourself on them in a recent book called "Crossing the Menai" by Reg Chambers Jones.
This is an illustrated history of the ferries and bridges of the Menai Straits,. As well as a chapter on the Moel-y-Don ferry there is also a chapter on early travel in North West Wales, and several old photographs.
At Moel-y-Don, there was an inn Ty'n-y-Borth (previously known as the Cutter Inn, and at Tal-y-Foel, the Mermaid Inn (previously known as the Menai Hotel). My family were ferrymen for 3 generations at Tal-y-Foel and there is a picture in the book of the crew of PS Arvon circa 1913 which includes my grandfather.
If i can help further please let me know.
Alan