We have two two-bedroom villas that we are splitting between 15 people, paying cash not points. Two of these people want to join us only on the last weekend. Can we add them to the room mid-vacation? That would give them keys as well as we want to add the ultimate park hoppers for them at that time. (They are planning on going to disney downtown at night). Is this possible? Or do we just have them move in unofficially? I really don't want to do that because then they couldn't use the pools, etc. Thanks for your help!