Youtube has a couple videos showing the Mayfly Festival at Oughterard. You'll get a peek inside of Tommy Tuck's shop shown in Jerry's bottom photo.
It is ridiculously inexpensive to hire a ghillie and boat on Corrib. Maybe on the other Irish Lochs, too. A frenchman who was staying at our hotel implored me to not tell the local guys how much the Montana guides get

The frenchies all dapped with live mayflies. None of them fly fished- ever.
You
are required to provide a lunch for each of you. Our lunches were put up in the morning by the woman at the hotel where we were staying and are supposedly among the best on the lake. The ghillies were happy to pick me and the white lunch bucket up each of the two days I fished.
As per tradition you'll eat on an island shore as the ghillie boils tea from water scooped out of the lake. My ghillie also fished which I assume is the norm when there is only one client in the boat.
"Drifting before the following wind" in one of those time-perfected lapstrake boats, was a personal long-time goal. Almost incidentally I even caught a few.