Yes some great tips here I also am an advocate of the fingerless gloves and carry plenty of spare batteries and keep warm with the handwarmers that us golfers use 3 in a pack and last a few hours...   Plastic bags for lens and camera is also good to keep condensation at bay which forms on the bag rather the gear..

Danny O'Byrne  http://www.digitalartzone.co.uk/

"All the technique in the world doesn't compensate for the inability to notice" Eliott Erwitt