The most durable light is two of them!
Now, if I was going camping and habitually would drop my flashlight, it makes me think about switches failing, leaks around the switch, torn tail boots, glass lens breaking, non-potted boards cracking (Fenix, 4Sevens, Olight etc, etc, etc)
I would get a 1AA light, twisty tail for waterproofness and reliability, a head that holds protected 5mm normally driven LEDs, make that multiple 5mm LEDs, no glass lens and single output for minimal electronics. Get the Peak single AA light with 7 snow LEDs with normal output levels and you're done. No switches to fail, no glass lens to break, fully potted electronics and brass battery button so when dropping the light down a mountain, the battery won't crack the board in the head from repeated shock. Loc-tite the tail mount were the ring does for a lanyard and you will be set. Run it on Energizer E2 lithium cells to make it lighter, run longer, won't leak and will operate in very cold temps.
The second light? Pick whatever you want and put some 550 cord through the tail ring and slide it in your holster. If it falls out of your hand, the 550 cord will prevent it from hitting the ground. Yes, I have camped with my sons and the 550 cord trick works great!