When something works, go with it! I can see where this will be great for people.
But must admit...after decades of backpacking (including a decade of being a wilderness ranger) I have spent years living on the ground -- my camera pack gets put on the ground, shoulder straps down, no worries. What's a little dirt or dampness?

But my best set up for my smaller formats (Rolleiflex, 4x5 and 5x7) is to hike with the camera on the tripod and the holders, filters, notebook, and meter in a shoulder bag...nothing to put on the ground, everything is quickly ready to work with the changing light.