That's the thing though, the bags and another knife add negligible weight. The pack (kifaru longhunter) isn't in the way at all while hunting, but is ready for heavy loads the moment the animal is down. I've tried to hunt without it, but I've never killed a critter several miles in where I wasn't grateful to have the stuff ready to go. And honestly hunting without it is a pain anyway, the pack just fits better and carries my stuff better, more stable and comfy, tight to my back. The whole pack loaded is about 17-23 lbs though, depending on how much water is in there, I barely notice it.
Definitely don't use the salt or a saw though, Since I'm boning everything, just need a knife. The kifaru bags weigh nearly nothing (about what pantyhose do, but I love the thought line!) If you're going to, Carry hide out to a road, then salt it.
There's also the issue of time. Every year I only have so many days, and I dont only have to get my elk and carry them out, but buddies' bulls too. Time is of the essence.
Here's another question for you guys, when at camp, do you prefer to hang meat (given a mild temperature) or use a cooler and ice?