all they would want is the food, and you can buy a bear canister for that. about 60-75 dollars, a bit expensive but worth it. YOu can get them at REI or Sports Authority or stores like that. Basically, you put all your food in the canister (and stuff like toothpaste, sunscreen, lotion) and carry it in your backpack during they day, and at night, put it like 50 ft away from your campsite. When you go to buy one, the people at the store will know more about what to do with it.
http://www.rei.com/product/768902