We're usually there for the Scottish weekend... and we'll probably come for Celtic Fling or Celtic Music fest, too. But they're not really 'Faire' like the actual season.

Here's the schedule:
http://www.parenfaire.com/EventsSchedule.htm

and the Irish and Scottish weekends at the Faire proper are:

An Irish Gathering (Sept. 9-10). Jig your way to the Stepdancing Stage as Irish foods, music, and dance fill the Shire.

A Scottish Fling (Sept. 16-17). Kilts a’plenty, Bagpipe Bands, Highland Games Competitions, Scottish Wares & Foods, Music & Highland Dancing, Sheepherding and Scots everywhere!