Hey there, Melissa! Thanks for popping in to planDisney with your question.
Melissa,
Oogie Boogie Bash – A Disney Halloween Party is a special event with separate ticketing. Your Park Hopper ticket is a regular theme park ticket and will not provide access to Oogie Boogie Bash. The event has sold out for dates this year, so you will want to cancel any dining reservations you have made for Disney California Adventure Park after 6:00 p.m. as only Guests with special event tickets will be able to stay in the park.
That said, Disneyland Park will remain open, and you can hop there once Disney California Adventure Park closes for the special event. There is lots of Halloween fun to be had at both parks throughout the day, including all the freakishly cute Halloween décor throughout the parks. My family loves the Halloween themed treats and snacks. Check out the
foodie guide on Disney Parks Blog to peruse the spooktacular options. I highly recommend the Mickey Bat Cookie at
Jolly Holiday Bakery Café and the Pumpkin-spiced Mickey-shaped Beignets at
Mint Julep Bar.
Wishing you a creepy fun time,
Kamini