p.1 #1 · Non-Backpack for trekking with 2 bodies lens attached
I do mostly travel photography and usually need two bodies within easy reach, without putting down a backpack and going through things. Does anybody have any good suggestions? Right now I am leaning towards one chest holster and one belt pack, but I would rather something that I could put both in without having to have both of these.
p.1 #2 · Non-Backpack for trekking with 2 bodies lens attached
How about a Kinesis belt system setup with a camera holster (C500 or C580) on each side. You can put a multi purpose pouch (M500) in the back for you extra lens/bits. At least with this setup you can 'put away' both cameras.
This may really be too bulky to work but worth a look.
p.1 #5 · Non-Backpack for trekking with 2 bodies lens attached
I am using a ThinkTank Change Up for trekking. It fits my 5D + 17-40L mounted and another lens (could be a 70-200 or another short tele). It is compatible with other Think Tank belt components, and so are at least some of their Holster bags. So you could easily have two cameras + three lenses or even four if you add one more component. You can also find components for just a body (no lens mounted), but I doubt these would be useful for you. And there is even one for a bottle of water (I actually always use this one!).