Why should they worry about dehydration when they have guns that never need reloading??

You need to place more faith in the script writers, that's why the hero can be shot to doll rags out in the middle of nowhere but wake up 2 weeks later in the arms of a beautiful woman who has nursed him back to health. Another 20 minutes and he's ready to go get shot to doll rags again.

Have faith Sue,,,,the Script Writers will provide.
The best luck is what you make yourself!