Hills Carnivale 2012 is today, May 19th from 12pm to 6pm at George Wilmore Park, Ferny Hills.
Hills Carnivale page has a lot of useful information.
This one snuck up on me. Has it really been a year? I remember last year's Hills Carnivale and it was definitely worth a look.
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I plan to visit later in the day and take my camera. I'll post whatever images that are worthwhile.