At
Disneyland they, sadly, do not have Magic Bands, but, what you should do is activate the Disneyland App on your phone (you can download the official app on any phone service store), and then use it to SCAN or write in the Ticket Numbers/Bar Codes for ALL the tickets in the party.
Once you do this, then when it comes to using your Fast Passes, you can just click on the Disneyland App on your phone, click on My Tickets and bring up the tickets for EVERYONE in your party. This helps a lot, to check in for Fast Passes. It also helps a lot for Park Entry, because when you go to the gate, you can show them the bar code that the App brings up, and use that as your ticket. Having it on the phone is great, especially if someone loses their tickets or leaves them back at the hotel.
If you don't want to download the app and use it, then, AT THE LEAST, you should take a picture of the Bar Code on the back of EVERYONE'S tickets. In a pinch, just bring up that picture on your phone screen, and they can usually scan it and let you in.
DO be aware that the Disneyland app (and the Disney World app) is power intensive. It will drain your phone at least 1 1/2 to 2% per hour, minimum, while it is running, even in the background. And you have to be very careful to check and make sure it is shut off when you are not using it. Find out how to search for and shut down apps running in the background. You should use whatever function your phone has to KILL the app when you are not using it. I have a cell phone that I can charge in the morning, and 24 hours later, after a day of regular use, it usually still has 25% battery. But with these apps, my batteries would often be drained by afternoon or evening. (So, yeah, also take some auxiliary battery packs/battery boosters that you can get at
Amazon, Wal-Mart or
Best Buy. Try to get a battery pack that is a minimum of 10,000 mAmp hours or better yet, 20,000 mAmp hours. Then I also use that to charge my IPAD, Kindle, etc.)