I just returned home from a week-long trip to Idaho with Mrs. Clusterfrack. We did a lot of backcountry day hiking and had a wonderful time. These were my first long hikes with my CZ P-07, and I had not had a chance to test my OWB holster. It is a Safariland GLS Pro-fit, and it didn't work very well. One issue was the outward cant of the grip, which interferes with backpack straps.
So, long story short, I ended up hiking very rugged terrain carrying my gun in a JMCK AIWB Wing Claw 2.5 with my homemade "junk carry pillow". It was amazingly comfortable.