I second Joe's vote on the Burren and Doolin in Clare. While in Doolin, be sure to hit O'Connors pub for the craic. The Bunratty event brings the full spectrum of dress from casual to the jacket and tie. Don't eat before you go, taste the mead, meet new friends, and enjoy the tourist party. As to what you're wearing, looks good and add a beat up, short, leather jacket. If you have time while in Galway, take the boat to Inish Mor and make the walk up to Dun Aengus fort. And then when you come back, we'll have to get the PA kilties together for some sort of event.