We are a family of 4 - 2 adults and 2 children. We have our trip planned and booked for mid november. My sister in law and nephew live in Florida and have annual passes. They just learned their scouting schedule for this fall and the two of them are going to join us for a couple of days. They would like to join us in a few meals that we already have reservations for. I will watch for those reservations until the trip and see if I can find them. How do I do that though? Can I book a dining reservation for two more people than are traveling with us? Do I need to be friends with them on my disney experience? Then could they change our fastpasses?