Bernard and Stacy arrive at the Mystic Hotel just a minute after the Phantom Mafia sneaks in the VVVIP guests. They were assigned to the double room just beneath the presidential suites, Bernard and Stacy made the proper check-in process and didn't complain to their assigned rooms.
They went to their room first to check on it and to freshen up; as the two siblings went to the elevator when Katie just saw Bernard's silhouette at the corner of her eyes and she just ignored it for she needs to go to their room.