Hi, I really need some help and I cannot find an answer to this on the site. My sister wants to join us for a few days of our trip to Fort Wilderness. (This would make 5) but she is not on our original reservation which is booked and paid for. Also, she is arriving from a different city and will only be there for the first 3 days. We are not a Disney dining plan and don't plan on it because we will have a camper. She does want to stay with us in the campground and take the Magical Express to and from the airport. Does anyone know what I need to do to add her to our reservation and to the Magical Express? Is this possible? I am really getting nervous because she told me she has bought the plane tickets.