Phenom:
I flew 'remote operations' for many years in Africa, usually on behalf of the ICRC. The charterer (ICRC) would supply us with a coolbox full of food and drink if we were operating from locations where it was not possible for us to get food and drink on our own initiative at either origin or destination.
If we were operating from locations where we could be reasonably expected to provision ourselves (e.g. from a city that has supermarkets, such as Nairobi), then we were expected to bring our own provisions.
Hope this helps.