There is,a "cell phone" parking lot you can wait at. When they know what time they will disembark they can call you. Of course the 1. Have to have a cell fon & 2. Know you are waiting in the lot for their call. Also, if you have their cell number you can call them. In any case everybody is off the ship by 10:30. And those are the stragglers.
Timing depends on their plan. There are scheduled disembarking times but if they are taking their own luggage off they can leave early.
Thanks! Your answer is awaiting moderation.