yuwc,
I suppose the answer will depend on how much camera gear you want to pack around, and what type of results you want to achieve with your photos. A dSLR offers considerably more control than a P&S camera for different shooting situations, and also the capability to shoot RAW (although some of the newer compact cameras also have that now).
My approach is to take both a full size dSLR (Canon 7D) as well as a compact super zoom (Panasonic, ZS-30). I primarily use the dSLR as that offers more control of things like shutter speed, aperture, ISO and the ability to use different lenses (I typically take two lenses, a 24-105 medium zoom and a 10-22 wide angle). I use the P&S if I go out in the evening and don't want to pack the big camera and also for snapshots of less important subject matter.
I figure that I may only get to many of the places I visit once in my lifetime, and I want to make sure I have the ability to get the best results.
If you decide to go only with a P&S camera, be sure you know how to turn the flash "off" as many sights do NOT allow flash photography.