I have done around 15 deer now with a sawzall and I find the emergency rescue/demo blades with fine teeth work best for me and have a set I use for nothing but!
I use a power inverter off the 4 wheeler or I have a battery opperated unit if it is to wet or swampy to get a bike or truck close to it when hunting moose
between the sawzall and the butt out tool and a good knife it makes work easy!