I put the same gear in a third back pack that I have and did the same rout.  This is a old exterior frame pack.  I found it to be much more comfortable than either of my canoe packs.  I have a cold now  which effects my breathing but could breathe better because the pack did not compress my chest like the canoe packs do. In spite of my cold I finished the loop in less time than with either of the other packs and it was easier.  Both of the canoe packs put some pressure on my butt and I think that causes my right hip to hurt.  The frame pack does not do this.  I will try it again with this pack and see if my hip still does well.  
MagicPaddler