I had an opportunity to spend some quality time up on the Appalachian Trail in Shenandoah National Park with this beauty of a camera backpack.  It has the structure and volume to also carry camping gear needed for a night or two sleeping trailside.  Check out the full review here:

http://www.p3newsreviews.com/2018/07/hands-on-with-shimoda-designs-explore-60.html