Boo to you, David!
Greetings Foolish Mortal, and thank you for bringing your spooktacular - I mean spectacular - question to planDisney. How exciting that soon you will be joining us for all of the Halloween happenings at the Disneyland Resort, including the Oogie Boogie Bash. I just attended this event the week before last, and you are in for quite a treat (and maybe a trick if the Villains have their way.)
David, when I visited just recently, I was also staying at
Disney's Paradise Pier Hotel (soon to be Pixar Place Hotel) and we used the hotel entrance door near Disney's Grand Californian to enter
Disney California Adventure Park. I assume you mean the gate door for Disney's Paradise Pier Hotel Guests to access the park. It was available for us to enter this way, both for our park visits and for the
Oogie Boogie Bash. Just remember you will need your room key to get through the gate door, and then will go through security and then scan your Oogie Boogie Bash passes at the back entrance gate for Disney California Adventure. When we visited, there was a Cast Member there at that entrance who gave us a treat trail bag and wristbands.
While I can't guarantee it will be open on the date of your visit, it was open for us for the Oogie Boogie Bash entrance just the week before last. I recommend confirming with the Front Desk at Disney's Paradise Pier Hotel on check-in that it is indeed still available for you on the day of your event.
I hope this helps you, David! If you have any further questions, step back in here - all the way in - and I'll be your ghost host to find the answer.
Happy Haunting!
Keri