Also, for anyone trying to plan a return journey into the city.
the last trains and regular buses are around 23.15 or so and available on the various websites
There is a also a late night Bus Eireann service to the city at 2am which will stop at the Mill (opposite the entrance) in Celbridge and go into the city.
The last free bus from the event to Celbridge will go around 12.30am so enough time to grab a batter sausage and chips in Macaris