I would take two bodies with me, with higher number of batteries and sd-cards. If one fails, the second will still work. I think that's the normal game without having a look at the brand of camera. If you need extended range for the focal range I would take an apsc one. The range (12 to 675 FF äquivalent) starting with the Sigma 8-16 up to Pentax 150-450 is covered, i would prefer a KP (even if I haven't used one up to date). If you can stay in the range 15mm to 450 a K1 would be fine.
---------- Post added 2018-04-09 at 12:19 ----------
Some times ago the SDM-motors of some optics failed (16-50, 50-135, 60-250) sometimes. This is fixed with the newer ones for a longer time now, but it will be recalled every time - the same as "pentax is doomed".
DA star lenses were supposed to be "extra special weather sealed", thats right. They are better sealed than the competitors at the same time. But even with that sealing, you shouldn't put it the water jet of a fire hose.
With my cameras I hadn't any fail because of weather conditions - they are all still working fine.
Last edited by joergens.mi; 04-09-2018 at 03:23 AM.