Key to the puzzle is getting the body temperature down. If you can get an animal to 55-65 degrees your laughing, as when you shoot them they are much warmer. I would FD and skin ASAP, then let hang to bring down the temperature. In the shade as direct sunlight defeats the purpose, once the game has sometime to set up and cool naturally if required debone and ice. Hot boning is the last measure I will use, if so I make sure the meat is spread out and cooled individually vs in large blocks. With a deer this is doable but larger game it is very difficult if it must sit on ice for any length of time. If just for travel quartered and iced would also work.