Wings of Redemption
The rules for Survival imply that you can find food and water for yourself plus others. You are still allowed to give someone else the food you find for yourself, however, so this effectively makes the skill “you find food and water for one person plus others, and generally you would eat some of it yourself.”
Also, extra food can be saved across days, but it weighs 1.5 to 2 lbs. per day and spoils after approximately 3 days. Found water probably doesn’t spoil this quickly, if ever, and its weight is separate (but water skins seem to include the weight of water in them and this is the only easy way to transport water, so the weight is included there).