Forgive my utter ignorance, but is Naas (assuming that's the location) reasonably got to (both in cost and journey time etc) from Connolly station? I know very little of Dublin outside the main town centre and definitely need to travel down on the train from Norn Irn.
September would probably work for me ... though I am planning some holidays away that month ... no definite dates yet.
you can get a bus from the quays across from connoly station to naas. there are a few buses that go. it takes less than 40 minutes. i will have a look at the bus times now and get back to you