Coincidentally, I just spent 9 days on a deserted island in the middle of the Pacific Ocean. I brought an Olympus OM-1 with a 35-70 zoom lens and an Olympus Stylus Epic 170 as a backup. I put some thought into this before going. I considered the conditions on the island, wind, sand, bright sun, rain, saltwater… The reason I took the Olympus OM-1 is it’s reliable, and it’s a great camera. I also have 3 other bodies and this was my worst one, no big deal if it gets damaged. I choose the zoom lens because it gave me the focal lengths I wanted without having to pack another lens or risk getting stuff inside the camera changing lenses.
I brought the Stylus as a backup. It’s also weather sealed, compact and takes pretty good pictures.
I considered taking a Leica IIIc but didn’t want to risk damaging my lenses.
my only regret, I wish a had a faster lens than the f/4 zoom for a few shots, but I got by ok.
If I hadn’t known a boat would pick me up in 9 days I may have chosen something different, and brought more film.