Hiya, Matthew, thanks for asking this question!
As a fellow Magic Key pass holder, I’m here to share some information regarding 
Magic Key pass reservations! 
I’m happy to report that if you have a
 park reservation on a travel day, you can arrive anytime before park closing to ensure you do not get a “no-show” penalty. However, if you do not think you’ll make it, make sure to cancel the day before your reservation by 11:59 pm PT. Even if you just scan in to grab a churro and exit, it will count as using your reservation. 
You’ll be arriving at the 
Disneyland Resort just in time to experience 
Halloween Time. It’s such a fun time of year to visit, and remember as a Magic Key pass holder you can hop between parks after 11 am PT. Head back to 
Paradise Gardens to enjoy 
Plaza de la Familia at Disney California Adventure Park, then grab some hot cocoa or a mocha to enjoy 
Halloween Screams and end your day at Disneyland Park! Make sure you check out the Magic Key pass discounts based on your pass tier, with all the 
specialty foods and novelty items, you’ll want to do some tasting and shopping!
I hope you have safe travels to California, Matthew! I know that it will be a frightfully fun time. If you have any other questions, we’re here to help! Feel free to 
send another message!
Adventure awaits!
Camille