Hey there, David! Thanks so much for stopping by planDisney with your question. It sounds like you have quite the epic Disneyland Resort visit planned with a pretty large party!
I'm happy to share that you should have no issues linking the tickets for your family of 15 on your Disney account to manage on the
Disneyland app. In fact, I actually recommend this to anyone who is traveling with a big group, especially if they are going to take advantage of certain services, like Disney Genie+. This makes managing
Disney Genie+ a lot easier as you will have control to book every one or a select number of your party for an upcoming Lightning Lane in one transaction for the same return time versus everyone needing to try to sync up and get the same return time. This will be beneficial for you trying to get into the virtual queue for World of Color as well.
Dining reservations are different and only the person/account who books the dining reservation will have access to the dining reservation. It cannot be linked to multiple accounts.
I do know from personal experience, that tickets can be added to more than one account, so I would think that you all would be able to link all of your tickets to your Disney accounts. I don't know if this could be any more beneficial than just one or two managing all of the tickets or end up making it more complicated. I do recommend that everyone or every household have their own Disney account and tickets linked to their accounts in case you all end up splitting up midday. This also will allow them to make the initial Disney Genie+ purchase on their own accounts with their own payment option. With everyone having their own Disney account and Disneyland app downloaded, they will also be able to
mobile order food, which is something I HIGHLY recommend with a large party. It really does make things a lot easier to manage.
David, I can't wait for your family to experience Disneyland Resort. Please come back and see us again if you have any other questions along the way. The magic is waiting for you at The Happiest Place on Earth!
Carrie