We are sixty days away from a vacation we’ve been planning for over a year and my mom just informed me that my sister would like to join us for a couple days of the trip. She and my dad and my DD13 are staying in a connecting room to ours where DH and I and our two other children will be staying. My mom wants to have my sister just join them in their room for a couple of days. I thought I had read somewhere that that wasn’t allowed. Can anyone shed some light on this for me? Can she just show up to the hotel and stay for a couple of days? We are staying at All Star Movies Resort.