Ha Sirius! I have an oversized Domke shoulder bag replete with hip belt that I can fit each of my P67 lenses in, even the big 300EDIF, along with one body and all necessary accessories. It can all be carried that way for minor distances. But since it weighs 40 lbs full of all that stuff, I simply drop the whole thing into the top compartment of my big external frame backpack; and then it's easy and comfortable to carry long distances, and I won't walk bent over herniated and crooked like an Orangutan the rest of my life. Besides, that give me a nice workout weight impending summer backpacking season. Otherwise, I have a small Domke shoulder bag which can comfortably handle one body an one lens at a time, for more quickie outings, or else with a Fuji 6X9 RF in it.
The problem at the moment is the shifts in our coastal winds. One day it's cold and howling all day long, the next day calmer. Right now, I've got 8X10 gear in that big backpack, anticipating a calmer day. But if it stays windy, I'll put back in the 6X7 kit instead. As Mark Twain said, the coldest winter of his life was a summer in San Franciso. It's even worse where we are on the opposite side of the Bay, with the wind and fog coming through the Golden Gate aimed directly at a low gap in the ridge behind us - same wind current migrating raptors use.