I have a large DSLR and two smaller digitals. Of course the quality from the larger camera is better, but it is heavier to carry around. The little one fits in my pocket, but hard to get clear pictures...no viewfinder, just the lcd screen. Anyway, please, I would appreciate any suggestions on how to handle, carry, store, your cameras. On ship, as well as flights.
Just don't put cameras in any checked luggage. If you really feel you'll use the larger one, then bring it along, but keep in mind the restrictions for even carry-on bags. You may want to also consider purchasing an inexpensive disposable camera, they do take some decent pictures and use that for going on excursions and not bringing anything expensive. Just a thought.
I don't have a digital SLR, only a regular film SLR. However, I haven't carried that one on a cruise since my first cruise in 2000, as I moved into the digital world.
It's possible to get extremely small digital cameras that produce awesome pictures - as a case in point, consider the Canon SD1000. It won Compact Camera of the Year for 2007, has 7 megapixels and face recognition technology, and fits inside a pack of cigs. You can find it online for $150 or so.
And if you want pictures with bazillions of pixels, consider making a multi-picture panorama that you later stitch together (with free software from autostitch dot net).
There sill be plenty of shelf space in your cabin to keep your cameras and they will be perfectly safe there.
Don't for get your battery chargers and take plenty of batteries so some can be charging while you are using others. and of course don't underestimate the amount of memory sticks you will need, especially if you take high resolution photos. Or take your laptop and transfer them to your laptop every night.
Be prepared to have them all turned on for TSA when you go through airport security.
Landlocked in Denver, but cruisin every chance we get.
Polynesia, Carib. '86
Cr. Odyssey, Scandinavia, '91, 30 Day S Pac. 2002
Crystal Harm, Aust., N.Z., '94
Royal Odyssey, AK,'96
Old Cr. Pr. Canal, '97
RCCL, Carib, 1998
Volendam, Car, 2000
Ryndam, 35 day S. Am., Antarctica, '03
Is. Pr., Canal, 2004
Statendam, 34 day China, Japan, AK '06
Cr.Pr., Carib. 08
Eurodam, Atlantic, Med. '10