Hi everybody! SO excited to have gotten FD online this morning - thanks to the great advice of DISers! My question is this - we just realized that we would have the room to bring my niece on our trip, which we would love to do. Can I add a guest after booking FD (she would be an additional adult - we have 1 adults and 2 kids booked in on CSR room and 2 adults and 2 kids booked in the other). Thanks so much in advance for any advice!