when gun hunting i do the same as stretch and use the hand muff that goes around your waist. i then wear some camo gloves that peels away so the finger tips are exposed allowing me to feel the trigger. i then put handwarmers in the back of my glove.

for bowhunting i wear a super thin glove on my trigger hand with a handwarmer in the pocket on the same side. on my left hand i wear the same glove i wear for gun huntin but keep the flap down over the fingers and do expose my fingers and use a handwarmer at the back of the hand again.