"I had a scale when I packed mine out two weeks ago and the front quarters with bone in weighed about 30 pounds. The back quarters with bone in were about 60 pounds. I put the antlers similar to yours in size, one back quarter and the bag of all the loose meat, backstraps, brisket, neck and so on one trip and it was right at 120 pounds with my pack and camel back. It felt like I could fly after getting it off. Mine was 1.3 miles back to the 4 wheeler though."
It is amazing how much variation in size there is amongst elk. The last five I weighed all of the meat when packaging. I had a calf elk that I got 80 lbs of meat off of, a small cow I got 160 lbs off of, a very large cow I got 220 lbs off of, and a couple of bulls that came in at 190 lbs and 220 lbs. That's consumable, trimmed meat only.