Dave,
I'm presuming you mean that cameras can not be out and in use while in the customs area. I intend to have my equipment in the bag I carry it in and carry it with me. No way is all of that equipment getting packed up the night before! Nor is it going out of my sight.
Also - for anyone traveling on either of the cruises, especially if you have any relatively new pieces - like lenses - make sure you have written down the serial numbers and if possible have the sales receipts with you! I had a brand new Pentax with several lenses that DH had given me for Christmas/birthday in the couple of months before we sailed last. The expert and the camera store mentioned this to him when he was saying we were headed out and what sort of filters for the Caribbean sun. Boy were we glad we had those receipts - as customs really questioned whether we should be claiming them. Mine are probably used enough now - little nicks on the lettering, etc. that I won't need the receipts. I hope because I now have NO IDEA where they are!
Deb