Hey there, Tammy! Thanks so much for stopping by the Disney Parks Moms Panel with your question!
It sounds like you are planning a vacation to the Disneyland Resort during
Halloween Time and I could not be more excited for you! You will love seeing all the autumn decor around the parks and the special overlays on attractions like Haunted Mansion Holiday and Guardians of the Galaxy - Monsters After Dark. Another absolute must-do this time of year is
Mickey's Halloween Party. While we don't know exact details for 2018 yet (check the
Disney Parks Blog this summer), I can tell you that last year, Disney California Adventure Park and the Downtown Disney District were open while Mickey's Halloween Party was happening in Disneyland Park. Additionally, if you had a ticket for Mickey's Halloween Party, you could enter both parks up to three hours prior to the party start time.
If you are planning to attend the party one night during your stay, I suggest buying your Mickey's Halloween Party tickets as soon as possible because party dates usually sell out fast. Additionally, you will want to take a look at the costume guidelines (on the Mickey's Halloween Party web page) for both adults and children. Children cannot wear masks that cover the entire face and no masks are allowed for the adults, among other things.
If you have any other questions, please stop by again as we'd love to help you continue to plan your adventure to the Happiest Place on Earth!
-Linda