From Athletics Ireland site - free parking on Sunday if booked in advance!

Cars bringing juveniles to compete in the under age championships will 
park at the Express Red Long Term Carpark, Dublin Airport (entry at side of 
ALSAA) 800 spaces. This will be accessed free of charge for the duration of 
the parking via pre- booking on the Dublin Airport Authority website 
www.dublinairport.com They will book entry and exit on the 17 
November. If you are using this facility please contact Athletics Ireland for 
the online code.