Hi, fordwillman,
went on a cruise to Ensenada two weeks ago. A few surprises. The travel iron I've taken on three other cruises in the last three years is now considered a safety risk.. leave the iron behind. What I threw into the X-ray tray and was allowed was my Leatherman Squirt P4 and a titanium money clip.
Also, call your cell phone company and find out about foreign phone calls and check your cruise line's policy on their charges for your phone call going through their system. (And maybe you won't get an $800 surprise)
Save room for dessert(s) and enjoy.

P.S. Five litres of rum per person through customs hasn't been a problem yet.