To keep my pack light I took only two lenses, the weather resistant Fuji 16-55mm f/2.8 zoom and the Zeiss 50mm f/2.8 macro for close-ups. As you can see from the first photo below, the rain came down heavily for part of the time.
Two things I particularly like about photographing in this type of weather are, first, the way the distant, bright areas mist out into a soft haze, and, second, the shade of green that comes from the overcast. I used a Provia color mode with an auto white balance for most of the shots. The monochrome images were processed in Acros mode with no filter.
After a few hours of photography, both the camera and I were thoroughly soaked with rain. Both of us survived the experience well enough to fight another day.