Hi Jennifer! Welcome to planDisney! I'm so glad you found us to ask this question and I'm happy to help!
How exciting that you're arriving at
The Happiest Place on Earth tomorrow and you're going to
Oogie Boogie Bash – A Disney Halloween Party! Because the party is a special and separately ticketed event, you would not be able to add on a park hopper ticket at a reduced price. If a
theme park reservation is available, you would need to purchase a regular-priced
theme park ticket to enter
Disneyland Park. At this time, according to the
Theme Park Reservation Availability Calendar, it doesn't appear that there is any availability to visit Disneyland Park tomorrow.
In case it helps with your planning, I wanted to let you know that you can enter
Disney California Adventure Park on the date of the party beginning at 3:00 p.m. for the mix-in. The party will begin at 6:00 p.m. and lasts until 11:00 p.m.
I hope you have so much fun at the Oogie Boogie Bash! When you have more planning questions for your next Disneyland Resort visit, we would love to help you at
planDisney!
See ya real soon!
Lisa