Kevin,
I have been to Dublin a few times, I have friends there. I spent two weeks in Northern Ireland, and One in the Dingle area. I loved Ireland and hope to go again, but it is changing rapidly. A highway is being planned to cut the Island in half from Dublin to Dingle, most of the main sightseeing areas are now heavily restricted where a few years ago you pretty much had run of where you wanted to go. McDonalds is vying for rights to put restaurants at the major sights, and overall, the mandatory mass immigration of middle European and African refugees are changing the charm of the Isle. That and the technological progress is rapidly altering the culture. None of it is necessarily bad, just different from what most people think of when they think of Ireland. I would think the northwest of Ireland would still have much of the charm left, and am planning to do some hiking there in a year or two.
It really is a great place and you might want to look into some of the hosteling tours- they are relatively inexpensive, quick and painless way to see the sights, and then go off and rough it in the lesser known still "real" parts of Ireland. Sorry about the ramble, Just happen to think Ireland is one of my favorite places.
Edited to add:
Yes, most shilelagh handles were too short to use as a cane, and there was a rule of thumb as to how long was the best length. I don't recall exactly, but I think it was shoulder to wrist. It makes sense, because a four inch diameter trunk is not going to give a branch thick enough much longer than two feet to use as a cane, let alone a cudgle.