In October there may be fewer vacationers, but the locals will still be there and assuming they're doing Fantasmic in October, the local Fantasmic fans will usually be there in force each and every weekend, often starting to get prime spots 3-4 hours early. If you wait until even 2 hours before the show to find a spot (assuming you want a sitting spot--you should be able to find a good standing spot at this time) and you plan to videotape, figure having the backs of a few heads in your footage. At 2 hours before the show, you'll be anywhere from 3-5 rows back depending on how center you are trying to be.