Jesuz man, you are either a beast or a glutton.
Is there meat coming out?

Nothing is going to change the 75 pounds.
Can you drop some weight?

For loads that size I’ve used a Barney’s, an astraplane, and my current SG guide. They all suck after a while.

I didn’t find the Barney’s to be appreciably better for the load carrying, but it definitely was better for bulky crap. It was also less fun going through alders.