Butchering big animals like elk or moose is no different than deer. I actually prefer to butcher an elk over a deer. Its easier to separate the muscle groups and make nicer cuts of meat with bigger animals like elk, for me. I prefer to do my own butchering so I can take out all the bones and trim up the meat how I like it.
I always mix 10% beef suet with my elk hamburger, and double grind it. Like YH, I use pork fat if I'm making sausage from wild game.