I went to this year's Spooktacular. It was set around a pirate theme. There were special "spooky" Cylde & Seamore and Pets Ahoy shows. The end Shamu show had a Halloween theme. Kids can come in costume and collect candy at many points around the park. Kids can show off their costumes in a show at the Bayside Stadium. The best part of this year's Spooktacular were the skeletons that were set up around the park. They were all in different, funny poses. You could spend all day just looking at all of them.
I have video of it if you want a copy. PM me for details.