If cold is really a problem, I suggest you buy a pair of Moose hide leather mittens, the kind designed to allow a wool mitten glove to sit inside it until ringers are used.
You'll want two pairs of wool gloves, that have fold over mitten style hoods, and partly exposed finger openings, so you can slip off the leather mittens, and pull back the finger hoods to operate the camera, etc.
In between needing to expose your fingers to the cold, rehood the fingers and slip the wool gloves back into the strong Moose hide mittens, to keep thin warm and dry.
The leather mittens should have a strong cord that allows full use of your arms, strung across the back of your neck, so they won't fall into the snow, and the two pairs of gloves us so, if you do get the wool gloves wet, you have a dry pair ready
By the way, wool can be very saturated by water (.70% of the wool garment's weight) and still keep you warm.
IIRC.