I shot thousands of frames of film and something like 9,000 hours of video during the Valdez spill in all sorts of weather. All the protective gear that's available commercialy is lacking in one thing, IMO, and that's a heat source to keep the air inside the lens and camera body from condensating when you go back indoors.
If you let this condensation form and dry a few times there'll be a film buildup on one or more of the inside lens surfaces where the water dried, this can cause a loss of sharpness and in sevier cases it will limit the amound of light that can get through to the film or CCD.
What we did in Ak was that we made a storage container with a small heat source and placed it in the vestibule at our studios. Raising the temp of the gear slowly prevents condensation from forming.
