Its getting to expensive now - $18/adult - fark that plus the exorbitant price of food and transport/parking. It very quickly turn into a very expensive day at the shops and thats before you've bought a damned thing!
I used to go when these sort of thing when they were cheaper but not now. The organisers of these events need to take a reality check!
Plus you can get all the good oil on whats good and whats not (ie voldemort campers etc) from right here!