Hey Jordan!
Welcome to planDisney and thank you for bringing your question our way!
I’m so excited for you to spend three days at “The Happiest Place on Earth!” And, I am delighted that you are planning to spend time at both Disneyland Park and Disney California Adventure Park. There is so much to see and do at both theme parks. You’re going to have an amazing time!
It sounds like you’ve already reviewed the guidelines on the
Disneyland Resort website and you are aware of the requirement for making advanced
Theme Park Reservations. This reservation is required in addition to your valid admission ticket and you can make a reservation for one theme park each day of your trip. Reservations are currently being accepted through November 2021.
Theme Park Reservation availability can vary from day to day as people modify or cancel their trip plans. I encourage you to keep checking for availability for the last day of your visit. In some cases, I’ve even seen same-day availability. Another solution is to have your friend purchase a Park Hopper ticket instead of a one park per day ticket. The
Availability Calendar varies based on ticket type. So, purchasing a different ticket type may allow your friend to join in the fun.
Enjoy your visit and please head back to planDisney with more questions!
Tiffanie