guess if you take the "necessary precautions" - such as keeping it warm under your jacket until actual usage, ... taking care of condensation issues when moving from a cold to a warm room..., etc - you should be OK. <-- thats the area i'm afraid. cos when work load gets higher, u tend to neglect the camera.
Why does the drain of batt is a bigger factor to consider? i've change the batt to the D200 one(EN-EL3). its of a higher mAh then the D50 one.
Since Nikon would say NO, i'd say NO too... hahaha
think goin to dig out my Canan S40 for this trip...