It totally depends on a few factors, how much space and weight you have for food, what kind of cooking facilities you have in camp, what temps can be expected for that week (frost at night?) and the pallatte of the parties involved.
Does cooking usually fall to one member or do you rotate?
There is no end of good grub that requires little cooking talent and no refigeration, eggs, pasta, rice, spuds, canned hams, fruit, some veggies, onions, cup-o-soup, Bisquick, saltine crackers, Ichiban noodles, French or rye bread, cheeses, kraft dinner, some types of mushrooms, many types of sausages, well cured ham, smoked meats and fish, bacon. And if you are getting frost at night this list can double.
Most red meats will keep easily for a week if previously sealed, frozen and wrapped in 5 or 6 layers of newspaper as long as it is not allowed to warm above 5 deg C or 40 deg F. If you do get frost at night even better. Even milk will keep for a week in this environment.