Lightweight, Tasty, High Energy. There are basically two kinds of backpacking food.
You could get freeze-dried backpacking meals, available in many delicious varieties but at relatively higher prices. Or, you can get food at your local grocery store, also with a wide variety of tasty choices, for less cost. Planning menus for a weekend trip isn't difficult. Adventure Alan's Ultralight Backpacking: Backpacking Food. Back to Adventure Alan's Ultralight Backpacking Home Page: This contains a wealth of information on backpacking with gear lists, trip reports, backpacking techniques for various weather and environments (cold rainy weather, alipine hiking, desert hiking), etc.
While focused on lightweight backpacking, much of the content applies to all styles of backpacking. Sample Food Lists New for 2008: and updated Sample Food List for a 5 day 4 night backpacking trip. Backpacking Recipes. Backpacking Food for the Soul.