http://www.scottishfest.com/

From the website;

"The Festival will be held on May 23 and 24, 2015 from 9:00am until 6:00pm at the Orange County Fair & Event Center
(Orange County Fairgrounds), located at 88 Fair Drive in Costa Mesa, California.

The Massed Bands will perform at the opening ceremony on Saturday starting at 12:00 Noon, and at Closing Ceremonies,
held on Sunday starting at 5:00pm

A Memorial Service honoring our veterans will be held at 9:45am on Sunday at the Alex Beaton Stage."

Tickets seem reasonable to me. Presale is a bit less. Parking is $7.00 a day.