Kate,
I would definitely say late July to mid-August are the busiest times of the year, simply because of summer vacations. With that said we have been in OC for Thanksgiving, NYE, St. Patrick's Day and several other Fall/Winter months and have experienced heavy crowds at certain locations.
Least busiest, fall and winter weekends in which there are no special events. But OC is definitely becoming a year-round resort, which is great for our area.
Thank you,
Anna G.
Answered: September 03, 2010