Best advice is to start with the animals butt uphill. Start with the first several steps including sawing through the pelvis bone. Once that is done and everything is mostly loose, cut the esophogas right under the chin and after you've cut the diaphram below the lungs you should be able to turn it's butt downhill and just pull everything out in one swift motion.

I did my deer and elk this year that way and they were the best gut jobs I've ever done.