I think that the main rule about photo gear toting systems we use is that “one scheme does not fit all.”
For example, in my day-to-day work, which often entails in and out of a vehicle, and relatively short walks, a Domke shoulder bag works great to hold 2-3 extra lenses, flash unit, water bottle and supplies. I sling a camera with lens over my shoulder or around my neck. Add a tripod or monopod for some assignments. This even works for many sports jobs.
But (for me) it does not work worth a hoot for hiking.
I recommend Kinesis as a manufacturer, having used one of their larger camera “holster” bags (for a “full size” pro DSLR) that attaches to my rucksack shoulder straps and hangs across my chest and belly. This protects the camera and lens, and holds a flash unit, filters, etc. Big downside is it is big, and makes me feel like Mae West – somewhat awkward with view of my feet obscured (at least I can see my toes over my belly without the camera case!).
For day-hiking I also have come to like my Mountainsmith “Cairn” model lumbar pack, equipped with a shoulder harness accessory. An extra lens tucks into one of the mesh water bottle pockets. Another may ride inside the pack proper. Extra lenses are protected by Zing! Neoprene bags.
The Kinesis system, being modular, allows expansion or contraction to suit photo aims of the day. Experience with the Mountainsmith pack tells me I like the supportive belt and shoulder harness, which nicely distributes the load. If I had one wish from Kinesis it would be for availability of a larger “catchall” pouch for lunch, etc. But that might be available from another source.
By the way, once upon a time I was Mr. Steady and very proud of my ability to use a camera at alarmingly low shutter speeds, handheld or with minimalist improvised support. Age and health issues have wrought some changes. I would not, today, write off carrying a reasonable tripod setup, especially if my hike were also substantially planned as a photo trip. But camera support choice is another topic, altogether.
Good luck in your quest. If your experience in any way replicates mine, you will never find the “perfect” system. But with reflection over your own needs and work styles, and what makes you comfy, and patience, and determination, you definitely will come up with something that works for you.
G.
