I am scheduled on the 9/15 sailing of the Explorer. We booked a guarantee room in hopes to get an upgrade. I have been reading some about tipping and have a question. As I understand it if you have a guarantee room you don't get a cabin assignment until you check in at the ship. If this is so has anyone ever tried to tip whomever it is that will be giving you the room? I'm not sure if that would even be a proper thing to do, but figured I would ask anyway. I was just curious. If you might have any experience in this I would like to hear about it.