I used to carry 3 bodies, one with the 20mm, one with a 35mm, and one with either the 85mm or later the 105mm. I also carried a 180mm, but didn't use it that much. The 35mm and 85mm's were F1.4, the 105mm was a 1.8, and the 20mm and the 180mm were both 2.8's. I also caried a vivitar (later an SB-25) flash for a long time that pretty much lived on the F4. The cameras were two F3P's, and an F4. Usually I loaded the F4 with colour, and the F3's with BW film. Later the F3's were replaced with F-801's as they wore out, and things moved away from BW to colour film all the time.
Believe it or not, all that stuff was a lot lighter than the digital cameras and zooms I haul around today.
Back in the 50's and 60's, the heyday of Life Magazine, Leica's were the camera of choice. A Leica with a 35mm f1.4 doesn't weigh much more than a Nikon 35mm F1.4 lens without the camera, so it was a lot easier to carry a bunch of different cameras.
In a really intense media 'scrum', you can clearly hear all the photographers cameras clicking against each other. If you've ever seen any surplus newspaper photo equipment for sale, you'll notice that it looks like it's been thrown in a tumble drier with a bunch of old fishing weights.
David Buzzard's Technical Blog