I use a Eberlestock just one on my backpack hunts in Colorado. It is not a light pack at over 7lbs but I have had elk in it and I could not lift it alone I had my Best friend help lift it up so I could pack it out. I was amazed the shoulder straps did not give out.
Just FYI I’m 6’2 and a ExMarine and there is not much I can not lift or move if I put my mind to it. It is a extremely tough pack.
I will be taking it to Alaska next fall Caribou Hunting on a DIY hunt.