Ireland for St Patrick's Day

Tomorrow I am going to Ireland!  It all came about when my neighbor in Mammoth Lakes ask me if I would change residences with her-  my Mammoth condo for her house on Achill Island, Ireland.  I will fly to Heathrow first- then fly to Dublin where I will stay 2 nights.  I will get to explore Dublin and get a good nights sleep before boarding the train to Castlebar where Tom, Eileen's dad will pick me up and transport me to me to my new home (for 3 weeks).  I will be there for St Patrick's Day.  I bought an umbrella and a raincoat for the trip- something I have never needed in California.