Like Galen Rowell, many of us like to create images in the backcountry. Next month I, along with my d800E/tripod/70-200/16-35/etc., my 52-yo wife, and several friends, will climb a number of 14,000-foot peaks in the "Chicago Basin" in the southern Rockies. We are okay with carrying 45-60 lbs several miles up mountainous slopes. We don't get cramps. Our backs don't ache. And some of the photos ain't bad.
Just sayin' -- one man's absurdity is another's bliss. Who's to judge?
p.s. For the Facebook pix I'll bring the S100, too -- the S95 died without warning in Durban last December due to "lens error."
I've been using the Mountainsmith Borealis AT for over a month now. I love it.It holds my d800E and four lenses (including a 70-200) -- in the bottom half. Elsewhere it has a laptop/Camelbak compartment, plenty of space for camera accessories and outdoor gear - jacket, lunch, water, first aid kit, etc. etc.
My Gitzo lashes on in several places.
Its made of stout (recycled) material with heavy-duty, water-shedding zippers.And it has a removal rainjacket.
Perhaps best of all, it has a sturdy waistbelt that transfers much of the weight to your hips.
It has no side/sling entry. But my d800E landscapes all require a tripod anyway. I carry a shirtpocket Canon S100 for wildlife and other snaps.