Hey Paul,
It's a little off subject but it's easy to take care of a big animal without boning it out. Here in parts of Alaska they have outlawed boning your meat in the field because of waste. I sure agree with that, at least let it hang overnight and you'll have a much better product.
On a big moose I gut first (I'm obsessed with getting it cool as quick as possible) you don't have to, laying on their side just skin back the top side,cut the legs and that side of ribs off and hang them or lay out on a clean tarp,or even better throw in the back of your pickup, spread the hide out roll over the rest and repeat, cut the back up in reasonable pieces and hang.
You'll end up with a lot better meat, not just a ewy gooey bloody mess in a bag.
John