The British learned the sport of Sagol Kangjei in the 19th century in the state of Manipur, India, and after refinement it was introduced to other countries as Polo. The "PUYAS" trace it to the mythological age when the game was played by gods.
Keep cameras and film as warm as possible. Frozen film becomes stiff and brittle. A frozen camera will not work properly and may result in torn film. If you keep it inside your clothing, put it in a plastic bag to prevent moisture from wetting the camera.
Carry a good Whistle for emergencies. Caution: Metal whistles, with a pea, can be a problem in the mountains. Your "pea" can freeze up, and what happens when you put your lips on frozen metal ?
Carry first-aid supplies for minor injuries. In particular, carry plenty of adhesive band-aids and sterilized bandages, because they can't be easily improvised in the woods.
Wear two pairs of socks to allow for sweat to absorb. When purchasing your shoes wear two pairs to try them on so you know you are allowing enough room.