Don't worry about what it weighs, just load the pack to what you can handle and make as many trips as you need.
I would second this, and it goes without saying that you should have a couple of big coolers with block ice in the truck to put the meat in when you get there.
Once it's down, it's just a matter of time, at least that's how I like to look at it. I take my time and don't over-extend myself, I enjoy the pack-out much more that way. If you stop to think about it, packing out meat should be a highlight of the trip. I like to leave a spare sleeping back and shelter in the truck, in case I get to it late and don't want to make the trip back in until morning. Also, a few cold brews.