I backpacked and traveled cross-country and overseas extensively with a 4x5 monorail...tho I tend to go with a non-folding 5x7 field camera now. Granted, the 4x5 weighs about a kilogram, a touch more than one kg with the 150/5.6 lens on it. The rail split into 6" sections and everything can be stored flat. But it is light enough to carry on a tripod/head without straining anything. Gowland PocketView. Only swing and tilt on the back, and full front movements on mine. Of course to shed weight, it had none of the perks of the heavier rail cameras -- indents, more than 12 inches of bellows, capable of larger lensboards and lens, the solidity of weight. Use too light of a tripod (<3lbs) and everything moves to easily if bumped. Loved it.
I found a good-enough pack for the 11x14 (canoe portage pack). Might be perfect if it was built for tall people. The 11x14 camera weighs about what my 8x10 does, it's the 11x14 holders that add up quickly in weight and space required in my pack!
If time is the most important factor, the camera (up to 5x7) is on the pod and over the shoulder -- can be set up and used without setting anything on the ground. I even carry the pod with the legs almost fully extended...set up is pretty dang quick! Then take a half hour or more fine-tuning the composition, waiting for the light, fumbling around, etc. before getting the image onto the film and the camera ready to move on again.
Costa Rica, Gum Print
Gowland 4x5, 150mm/5.6 lens