As far as I am aware bro, the only transport would be a locally sourced bus which brings students from Carrick to NUIG. Beware that this is a cunt of a thing and goes in the evening which would undoubtedly be no good to you (there may be an earlier one these days). I can look into it more if you want.
Your best bet is driving. Slow up on the beer the night before, stay for a couple of hours in the next morning and you should be grand.