Few things I'm taking from this... don't overthink, use what you have and take photographs (it's a mantra that bears repeating); but make sure you know your cameras, because when you've committed to a trip, you need them to work; and the sturdy, affordable digital workhorse doesn't exist. I will always take a digital with me (at least you know right away you got some shots in the bag with digital), but it's going to be a hobbyist or enthusiast camera. Frankly, 4/3rds are starting to look good - never took to the image quality but they'll get the job done, and you can use a variety of lenses. Even if the camera bites the dust, you can re-use your lenses with another body. Once you set out to take photographs, the requirements for the tool become clearer. Use what ya brung and make sure it works, and don't let it brake the bank.