Car parking at North Dublin stations

[Padna]

This coming Wednesday I plan to drive from Dundalk to Dublin and spend the day in the Baggot St area. In the evening I need to go to the Airport area by car (not the Airport itself). To avoid high parking charges and congested traffic in the city centre, I was thinking of driving as far as one of the stations on the northside (somewhere between Donabate & Clontarf Road I guess), parking the car for free at or near the station and travelling to and from Pearse Station by train.

Which would be the best station to ahead for, considering (i) availability of parking and (ii) ease of access by car from that station to the Airport during the evening rush hour? If advisable I could leave Dundalk quite early in the morning - 6:15 or 6:30 would not be a problem.

Thanks in advance for any suggestions.