Thought Clarion might be a bit far out?......would prob need to get a taxi in would i for concert at 6 p.m. in evening?......maybe i would be better in city centre?
I think the nearest hotel is the Aisling but to be honest, I wouldn't stay around there, bit of a red light area. Dublin Bus run buses from the City Centre to concerts in the park so I would stay more centrally and get the bus up. Alternatively, Parkgate St on the 25/66/67 route so maybe the Clarion at Liffey Valley?