I’ve never heard a guard say that. They just check if the name is on the list.
Adding your guests to your reservation is a good idea, but likely not needed. Your guests should know the name of the reservation holder (you) and the check-in date -- also likely not needed. The guard shack CM will not recite a list of names, so nothing to worry about
Thank you. I think I was just over thinking it because of the surprise element. I guess I won't even add them and hope for the best!