Don't risk it! My advice to you is to buy bear proof bags, your life is worth that investment. When you are on your trip make sure to hang the bags of food on a tree branch a good 5-10 yards away from where you are sleeping so, for one the mice and other small rodents can't get into it and also if the bears happen to come by they won't have a reason to be poking around where you are sleeping.
Freeze-dried foods. If you go to a local outdoor/backpacking kind of store (Outdoor Gear Exchange,or Eastern Mountain Sports) the usually have racks of freeze-dried camping foods where you just add hot water and viola! you have chili or some other kind of soup, etc.
Instant stuff:
Instant oatmeal, instant coffee, instant hot chocolate, cup-a-soup, all of this things are real light (just little packets) and really quick and easy to make in the morning or when your really hungry and want food quick.
Energy bars:
Power bars, Cliff bars and any other bar that is in that aisle at the grocery store is great as a quick energy booster on a long hike, or a snack before you reach camp.
Drink Powder;
there are so many different kinds it doesn't matter what you get, just get something along the lines of gatorade powder, that you can pour in your water bottle on those days when its really hot, your breaking out a sweat and you really need to replenish all of those lost sodium, sugar...etc.
