There is a bus service from Ferrol to Covas, and the albergue is then a short walk. I took a taxi from the bus/train station, which took 20 minutes or so.
In my case, I arrived mid-afternoon. There was no prospect of walking around the headland back to Ferrol at that time, so I had always planned to stay at the albergue and walk the next day. However, as the crow flies it is not that far, and I think you might find forum members who have used the albergue and walked back across the headland to Ferrol, about 10km.
The albergue has beds for 18 from memory, and is close to the village supermarket and a couple of cafes. Note, however, that do not provide an early, pilgrim, meal but serve dinner later in the evening.