I think a reasonable weight (for someone who has to ask the question) is about 1.5 to 2 pounds per day. With some more experience, you will be able to taylor it more to your style of backpacking. However, the point made that the longer the day, the more snacks you need is important. You would be surprised what a 280 cal bar will do as a pick me up. That and a 20 min. nap around 2 in the afternoon .

Myself: For 1 week, I need about 1 pound of food per day for the first 4 days or so. This is as long as the mileage is around 10 mi. or under. After that I need to up the snacks. The rest of the week I can get by with the 1 pound, but I will probably be hoping to supplement with fish...