If you don’t particularly like huge crowds of people, but you do want to see what it’s like in Dublin’s famous Temple bar area on St. Patrick’s, then there’s an option for you.
Year round there is a webcam broadcasting from the hub of tourism in Dublin. The Earthcam camera looks out over the Temple Bar pub. There’s no busier day of the year than St. Patrick’s day, and you can experience it (sort of) without all the hassle.
It’s strangely fascinating to watch and you’ll likely spend a few minutes trying to spot something odd. You can watch the live feed via this link.