The Brewery Hops company (link below) do tours of Irish craft breweries around the country. I've never done it myself but it might be worth looking into. As far as I know, most breweries would accommodate a visit if you give them a call in advance.
Enjoy the trip.
Cheers,
Killian
[url:3tu15fkm]http://www.breweryhopsofireland.com/[/url:3tu15fkm]