I've been doing DIY solo elk hunts since the early '70s. I carried a few out on my back and hauled a dozen or more out on my horses. Also used them to pack out a solo DIY Shiras moose that I shot about 5 miles back in a wilderness in SW Montana. Here's a fairly recent bull from a solo hunt not far from home...
Not an elk, but a mountain goat that I shot many years ago on a solo DIY hunt. It was -5* F and knee deep snow when I started up the mountain. I skinned him out, put his head and hide in my backpack, and rug his body out over the snow.
One of my DIY solo rams from one of Montana's unlimited tag areas. I packed the quarters on my back down to where I could get my horses, and they carried him out the rest of the way.