I think the most overloaded party I've ever met was a little over two years ago in SW Washington's Indian Heaven Wilderness. Three men had enormous backpacks, must have been 50-60 lbs. Two women were carrying day packs, and there was one child. They also had three pack horses, well-loaded. One horse was probably carrying horse stuff (feed, hobbles, ropes, etc.), but the other two pack horses would have been carrying 150-175 lbs. apiece of human gear. Doing the math, they had at least 450 lbs. of gear for 6 people--for a 3-day weekend!

My pack for the 3-day Labor Day weekend was 19 lbs., and I was very comfortable.