2.5 lbs per person per day is probably a good ball park for food, not including drinks. Maybe a bit more if you are very heavy on fresh food and canned good. Maybe as low as 2 lbs if most goods are dried and you have little refridgerated or canned good.
When I outfit outdoor trips, actually using food weight has proven to be a good measure of whether or not a trip has packed too much or too little. 1.75 lbs per person per day for for light eaters, packing all dried food. Any trip with more than 2.5 lbs of food per person per day, including some canned goods has come back with food.
When I traveled on a pocket cruiser trimaran
, I was able to keep fresh water
use down to about 1.5 gallons per person per day. (Ball park of 12-13 lbs per person per day) About 3/4 gallon per person per day was for drinking, and the rest of washing
people, dishes, hands, etc. Washing
dishes with salt water
first, really cut down on fresh water needs.