Well, as far as horror stories go...
I went on a retrieval trip with a bud of mine that shot a cow moose with a bow, right at last light. It went out into a fairly large pond to die.
He got nekid and swum out and got a rope on it, hauled it up on shore and field dressed it in the dark and wet. Then got himself un-lost, well enough to find his truck in the dark.
He made it to work the next morning, we cadged a scam day and went and found the moose. Eventually.
Once we found it, chainsawed a way through the wind fall, beaver fall, and generally made somewhat of a plan for the route out, we quartered it and loaded the whole thing onto his ATV to haul it out in one go. Rolled the hole lot over twice on the way out, winched it back upright and generally got tired, wet, muddy, sore, and laughed like lunatics.
Fun!
Lots to be said in favor of stripping the carcass of all the edible bits, and leaving the bones and hide for the local critters. Pay attention to the provincial needs for keeping the tag on the quarter that has the evidence of ### and species on it. Have a plan, pay attention, esp around the genitals and tail.
I have hauled a LOT of deer out of prairie fields and bush using nothing more complicated than a single cargo strap as a haul rope. The one end is used to truss the front legs together behind the head of the deer, the other makes a loop that goes around your hips to be able to drag without trashing your back.
Deer hair slides pretty well on the snow or grass. If ya gotta skid it out, trussing the legs behind the head keeps the head from digging in, and the deer naturally stays open side up on the drag. Not much edibles directly inside the body cavity, so washing it out does not soak down the good bits.
This does presume that one removes the heart and tenderloins and stuffs them in yer pack from the start.
This leaves the hands free to deal with climbing, carrying the rifle, etc.
Cheers
Trev