Quick question - does everyone in your party need to be present at check-in to "activate" the Magic Bands as room keys, or are they all automatically linked together at check-in since they are part of the same account/reservation? My grandmother is staying with other relatives during the first half of our vacation and we are trying to figure out the best time for her to come to our hotel - if her band is active simply by being part of our party I can just give her the band before we leave for the trip, but if she needs to stop by the front desk for it to be activated it makes things more complicated. I cannot for the life of me remember what we did back in February with our group.