My husband and I are renting a car to drive through Ireland for a week. We are only doing a day stop in Dublin, coming south from Drogheda on the M50. Our concern is where to park/what to do with our rental car, as I have heard that parking in the city centre is virtually impossible. I have heard of "park & ride" locations where you can pick up the DART into the city, but not sure where to pick up? Any suggestions are welcome on where to leave our car and how best to get to the city centre/Trinity College area. Thank you.