Yes, that's good advice. When I did this trip last year I took the train (I detest long distance coach travel). I needed an overnight hotel both before and after the holiday - there is a Travelodge which is convenient for both the rail station and the ferry terminal, and was half the price of the hotel in the brochure with no need for taxis. It's worth all the hassle getting there - this was a very good first visit to Ireland.