getting an elk back to my truck is the hardest thing I've ever done.
You have to butcher it in the field...its called quartering, though I take the majority of the bones out so that it weighs less...then, depending on size, you make 4-5 trips back and forth to camp.
at least thats how i have to do it. hang the meat in a cool spot in the shade and do your trips. This year necessitated 5 solo trips back and forth and they were over two ridges that both topped out above treeline...one way was 2 miles, but you had to climb the ridges there and back
anyway, I'd have driven down and hired a pack horse if that happened again. it almost killed me and took 2 full days.