Horses for courses...
Pack, drag, sled, cart, mule, horse, 4 wheeler, mini-truck, pick-up truck, broken down, whole, field dressed...
Any of it works, some better in different situations than others. Heck of a lot of work to break down a deer and frame pack it if you're only a hundred yards out your back door, but it's pretty stinking hard to drag game whole very far... However you're hunting, consider how you'll get it out.