Greetings, Jessica! Welcome to planDisney. Thanks for bringing us your question!
Your visit to the 
Disneyland Resort will be here before you know it! The great news is that if you didn't add Genie+ - which will become 
Lightning Lane Multi Pass on July 24 - when you purchased your vacation package, you should be able to add it on the day of your visit. Make sure to download the 
Disneyland Mobile App and log in to your 
MyDisney Account before your visit. Once you use your ticket for theme park entry, you can purchase the Lightning Lane Multi Pass in the app. The earlier you enter one of the Disneyland Resort Theme Parks on the day you visit, the earlier you can choose return times for attractions. 
Jessica, did you know you'll be visiting the Disneyland Resort during 
Halloween Time? From ride overlays to the Main Street Pumpkin Festival, there will be so much to see at The Happiest Place on Earth. Be sure to check the 
Disney Parks Blog before your visit to preview the seasonal treats that may be available during your visit!
I hope this information helps, Jessica! Please visit 
planDisney again if you have any other questions.
See ya real soon,
Melissa