I use Nikon bodies and Nikkor lenses. I’m currently using the D810, D800E, D800 series. I like to bring at least three cameras so I don’t have to change lenses and I can count on a backup.
My choice of lenses really depends on the assignment and what I plan on photographing. For instance to photograph wildlife I need longer lenses like the 400mm with an extender or the 80-400mm. When I shoot in low light, which I often do, I prefer 1.4 aperture lenses, the 50mm being one of my favorites. The 24-70mm is my workhorse and I’ll bring a 14-24mm, a couple Speedlights and my Gitzo tripod. And of course the Mac laptop computer and all the cords.
I find it best to travel as light as possible as I hand carry all my equipment on the plane.
I always bring clothes to dress for layers and bring a medical kit because it seems there hasn’t been a trip where I haven’t reached into it for something!