This might be the world's largest fanny pack. I know it looks silly but it rides surprisingly well. I've only walked around the yard with it, however. I haven't taken it on a backpack trip. It's a little bouncy but less than you might think.
One really nice thing about this configuration is that it balances so well. There is very little forward or backward pull to it. There is plenty of space to attach more stuff to the upper frame but it is cool to walk around with very little on the upper back.
We are still in the about-a-pound overall pack weight category(frame, shoulder straps, waist belt & bag) with this option.