Hi there, Jesse!
Welcome to the Disney Parks Moms Panel. I can't wait for your ghoulishly delightful visit to the Disneyland Resort!
Halloween Time is my favorite season. I just love the autumn decor, fall-spiced treats, and Characters dressed in their Halloween best.
It sounds like you are a big fan of The Nightmare Before Christmas! I'm delighted to tell you that you will be able to find so much inspired by this film around the entire Disneyland Resort this Halloween season. From merchandise to treats galore there is something around every corner. Jack and Sally have been spotted recently meeting Guests in New Orleans Square. While I'm not sure how long they will be visiting, I hope you will be able to see them during your trip! Nearby you can ride the transformed Haunted Mansion Holiday throughout the Halloween and Christmas seasons which I think will be the highlight of your vacation. Nearby at Disney's Grand Californian Hotel & Spa you will also want to see the giant Halloween display featuring the infamous Oogie Boogie.
A way to truly enhance your Halloween visit is to attend
Oogie Boogie Bash - A Disney Halloween Party. This specially-ticketed event provides frightfully fun experiences for the whole family on select nights in Disney California Adventure Park.
I hope this helps, and please return if you have any other questions!
-Jennifer