If I booked an excursion through the cruise line. I do not take my passport. if I booked an independent excursion through another vendor I take my passport. you cannot do anything without your Passport. You can’t check into a hotel, etc. I was recently on a trip with a lady who had her passport stolen on the airplane. when she landed in London she was not able to go onto the next destination, and had to buy a return trip ticket to fly back to the states. a photo copy of her Passport did no good and no one in the UK cared. Because she had global entry she could fly home without her passport. To get it re-issued by the embassy, She would have to have stayed a few days in London to get this accomplished. because she didn’t have her passport, She couldn’t check into any hotel. Weigh the risks before you decide what is right for you. When I do carry my passport, I carried on my person, not in a handbag. Even on an airplane I carry it on my person.