I have routinely carried up to a week's worth of food on backpacking and climbing excursions and that is a fairly typical limit. For those trips, often light weight chow is at a premium, so the meals aren't always gourmet.
In any kit carried on foot, water will be the really heavy item. It is hard to give a hard and fast rule because water supplies may range from over abundant to totally absent. In desert conditions, I often backpack canned foods instead of freeze dried, if water will be scarce.
One thing about food, it is the one item in your pack that becomes lighter day by day, so you can indulge in a little extra weight at the beginning. Of course, if you are travelling by vehicle, weight limits for food are essentially meaningless. When evacuating, I have always tried to drive or pedal, rather than hike (being prepared to hike, if necessary)
Actually circumstances and environments vary so much that it is hard to develop an absolute rule. But I have a life long habit of eating which I like to indulge.
Edited by hikermor (09/28/18 02:29 PM)
_________________________
Geezer in Chief