I have only been on 2 cruises thus far. One on Carnival and the last was on RC Liberty of the Seas. Each cruise had an evening when everyone dressed in white...well other that those who are out of the loop like myself. I have a reservation on the RC Oasis in Oct/Nov and wonder if white night will again occur. I am also wondering about any Halloween celebrations since our first night out will be Halloween. Should I be prepared for a masked event?