When we went last year, I set up an MDE account and added DH and DS. I did all the FPP etc.
I am about to plan a trip for my sister and her family, and my parents. None of them have an account. They may split up in the parks, though they'll always be in the same park. However, most of the time they'll be together so I will be booking more or less the same FPs for them. Ideally they will be able to then adjust their own as needed during the day or book new ones.
What's the best way to do this? If they each set up an account, can they be linked so I can book FP for all of them at once?