Josh,
There was a fellah named Ronan Walsh from Ireland who posted here a couple of times, and then visited. I did not meet him but I think Charlie S may have taken him fishing. I don't recall where he was from, but Ireland's not much bigger than California. He might be some help.
I have another friend who fishes the Blackwater in the South, and I have stayed at a B&B in Watertown that is on a lough that allegedly has good fishing, but that's on the Kerry Peninsula.
My maternal grandmother's folks were from Sligo - name of Fee - came over in the 1840's - have we had this conversation before - I am getting forgetful.
It has been five or more years, so the old email may not be good anymore, but it was
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WE exchanged a few emails.
Maybe whoever took him fishing will chime in. Hope so!
Slainte'