Hi Frank
Yes, its a good spot and not fished that much. I will be trying to get out there this week to look at some more marks! My next door neaighbour runs a small business letting cottages at
http://www.eurocottage.ie - his cottages are too far away but he might have local knowledge (he's dutch).
In terms of the marks , all I can do is point you to the front of the site and the section "shore marks" - everything that I have found is up there bar any marks where I have been asked not to give information out publically, which has to be respected. I do not use GPS myself.
http://www.sea-angling-ireland.org/shor ... yo%202.htm
Sean Lavelle a local skipper is very knowledgeable and very generous with his advice. You will find him in the charter boat section. Just a word of warning, the mini fjords facing the Atlantic are fearsome places if there is any swell at all and access is the main problem. Scrambling over rough ground for 15-30 minutes would be the average in most places - there are a few exceptions - and that can include stretches of pure bog! I would not advise even experienced and safety conscious anglers to fish some of these marks on their own - bring some keen angling companions!
One final point: the best fishing here is September to November in between the storms! Leave it as late as possible...
Hope this whets the appetite!