For my hands I am using some excellently made German cold weather over mitts on top of British army wool pile liners and a thin pair of poly fleece gloves as liners. In really extreme conditions I have a pair of waterproof British army mitt shells that will fit over the whole arrangement.
This allows me to remove the mittens but still keep the gloves on, which are fine enough to handle the controls of my photographic equipment but does not expose me directly to the elements.
For working around the camp I have a pair of leather gloves, again with removable wool liners.
The removable liners allow the gloves or mitts to be dried more easily by separating them and by carrying spare liners any wet insulation can be swapped out for dry liners if needed.
To reduce the risk of losing a glove or mitt, these will be attached to a leather yolk strap worn around my neck with elastic and small karabiners.
I have decorated the mitts, with the simple addition of a spare piece of patterned tape left over from an earlier project and added a sheepskin patch to the back of each mitt for wiping my goggles with too.