We have two families going to Disney next October. The dates only overlap for a few nights. At 180 days can the family arriving first make reservations for the whole group for the nights later in the stay when the second family is joining? It would only be for the nights the entire group is trying to dine together. Or do we need to wait for the second family's 180 day mark to open? I have tried to look through the forums but was unsuccessful finding the answer. Sorry if I missed it!