In the Old Days my working travel kit was made up from three Nikons and three Leicas. Nowadays my old friends live in an equipment cabinet and my daily image-making tools are all digital. Sic transit gloria.
I use two Canon SLRs that are extremely capable instruments, but are also big, heavy, and require a take-along camera bag for lens, batteries, filters, and all the other stuff that I feel I might need when I use them.
But my ideas about working kit are slowly morphing into something very different. On my latest trip to Ireland I took along my biggest and heaviest Canon, with a couple of lenses, plus a little Panasonic Lumix point-and-shoot. Admittedly it's a point-and-shoot with a Leica-designed lens, which really does make a difference. I found myself making the majority of the images I shot on that trip with the Lumix, while the Canon SLR waited in the camera bag (usually back in the car).
One of the people on my trip had a little Sony pocket-camera that I was much impressed by. Instead of the shutter-like lens protector, which I distrust, it had a sliding panel that both protected the lens and turned the camera on and off when slid up and down. I was so impressed with it that I ordered one of my own as soon as I got home. (Actually, I ordered it on-line while I was still in Ireland.)
The Sony I bought is slightly different from the one that inspired the purchase. I went with a "ruggedized" version that is water- and temperature-proof and drop-damage-resistant as well. It is so small that it fits easily and comfortably in a shirt pocket or a front pants pocket. Since it arrived I have carried it with me in a pocket at almost all times.
In the interests of my newly evolving working kit I also bought an upgraded Lumix. This one has a fast f/2.0 Summicron Leica-designed lens that covers a range of 24-90mm (in 35mm equivalencies) and takes a removable viewfinder so that I can use it at eye-level just like a "real camera." I've never taken to the arms-length LCD screens, although I use them out of necessity.
The Sony and the second Lumix will make up my new travel kit, with the first Lumix as a back-up. All three cameras together weigh a pound and a half: the body alone (with no lens attached) for my Canon weighs two pounds.
There must be a trade-off, and there is. I'm giving up long telephoto capability and also losing some megapixels. But both the Sony clam-shell and the Lumix are capable of making 12x16" images and the Leica-lensed Lumix can give the larger Canon a run for its money. Pixel count is only part of the story of digital image quality.
At any rate I now have a working travel-kit that will fit in my pockets and do a lot better than a merely good job on about 95% of the pictures I want to make. In the event that I feel I must make a long-lens shot I can always sacrifice a little absolute quality and make use the digital zoom feature that reaches out to about 500mm in old-time 35mm terms. On this last trip I found no use for such a lens.
I'll try to get some pictures of this kit soon.