I've been using my Waldrop for my Idaho moose permit this fall. A couple of comments. I kept hitting the metal tubing with my bow in rougher terrain and thought about pool noodles to deaden that sound. Last night I pulled out the pack bag and after a bit of figuring things out, the genius of its design and the pack overall started coming through.
Normally I strap on my soft day pack to the frame. Now I just drop it inside the bag and the lower bag strap holds it from slipping down and up on my upper back with lots of room to carry the first load out of meat below it with the pack on top.
The bottom part of the bag wraps around the sides when the lower strap is pulled tight, hence muffling the noise if I bump the longbow against it. That problem is pretty much solved.
The first photo shows the bag attachment to the frame pins for the shoulder straps. A moose call is clipped onto the closure cord with a carabiner for quick access. The day pack is inside, with all the normal processing gear and stuff together and protected.
Undoing the strap around the bag two-thirds the way down allows the metal foot to swing out for the chair and the seat drops down the other way in front. The pack is out of the way and it takes all of a couple of seconds to sit over a wallow or water hole.
Hope these pictures help or you can access a video.