How many people, how much storage space do you have, and are there any dietary issues that need to be kept in mind? Bugging out or digging in?

If you are restricted to a week out of the grocery store, you really aren't restricted. For this mental exercise, I'll assume you don't have a gourmet grocer around, where you can do things like by whole chickens in a can and loaves of bread in a jar. If you have one, take advantage of it. You will wow them at your next dig in. <img src="/images/graemlins/smile.gif" alt="" />

For fruits and vegitables, the canned stuff is obvious. Dried stores better, but it means you need more water. I suggest a mix.

Starch:
Crackers, thin bread, motzah
Rice (lots of varieties)
Instant mashed potatoes
Ramen cups

Meat:
Canned (not just tuna and spam- you can get canned beef, turkey, chicken and ham)
Hard sausage (summer sausage, hard salami and pepperoni)
Bacon bits in a jar- find them in the salad dressings, mix into stuff for flavor
Velvetta, generic processed cheese
Powdered milk

Non-meat protein:
Nuts
Dry or canned beans, lentils
Whole grain noodles- save the water for soup stock if you start it almost immedicately, or use it as part of your grey water reserve

Spices, tea and bagged, unground coffee beans are good for a year or so. Coffee in a can, a couple years. Flour, salt and sugar, so long as they are kept in a dark, cool, dry, bug and mouse free location never go bad. Cooking oil, vinegar, hot chocolate, tang, good for about a year unopened.

If you have the gourmet food store I mentioned, you can get cheese and butter powder which is good for 6-12 months, and even both in cans. Check out the Vermont Country Store online. Canned beef, chicken, pork and turkey in BIG cans, and other goodies.

Look for freeze dried food in number 10 cans from Mountain House and others. There are tons of suppliers, beprepared.com is popular. It looks pricey, but when you realise there is something like 10 servings of beef stew that will never go bad so long as the can stays sealed, it really isn't that bad.

Even with just your standard grocery store, it's easy. The questions you need to ask before you start shopping are, (a) bugging or digging, (b) how will we cook it, and (c) how will we store both the food and the cooking fuel. And where to stash the water that should go with it.

It really isn't that hard.