Congratulations. I always like to hear what load and bullet you were successful with. If I were you, I think I'd carry a small saw and do a little trimming to widen and lengthen my shooting lanes. Especially since it seems you have a great location.
I've dragged a couple of deer, and found it to way too hard where I hunt. Lot of up and down, no snow, lots of rock and cactus. I butcher my animals in the field. I can cut up an elk in 3 hours by myself. With a cheap gunshow pack I hauled out my spike elk'hind quarter, the backstrap, and the head in one trip. Of course it was less than 1/4 mile and all downhill, steep downhill. I'm 69, so you've got a few years on me. I don't know how far from the truck you hunt, but for me iit is much easier to make two or three trips than to drag out a deer. I've hauled elk as far as 5 miles (when I was a few years younger). I use plastic bags, but I've been told that garbage bags have a tint in them that isn't good for you, and now they add scent to lots of bags. I have a supply of clear bags that we used to use for recycling. I use frozen milk jugs to keep the meat cold. I kept the elk in my ice chest for a week while cutting and wrapping a bit each day.