I almost always have fully field dressed the deer I've killed at or very near where the animal falls dead. I don't just remove the guts but the whole shebang -- lungs, heart, liver, kidneys, and as much of the larynx / esophagus as I can reach and leave it all there. The one time I can recall that I didn't was the biggest and heaviest deer I've killed so far. Coyotes were out thick that evening and several were within yards of us and it was almost dark. I wound up field dressing that deer at the truck which was about a 1/4 mile give or take from where it dropped.