I am a hobbiest photographer and a college student. There are many occasions when I take my camera with me to classes, sporting events, weekend trips, etc. Consequently, I am looking for a backpack that has one compartment where I can secure and protect my camera equipment, and then other storage space where I could carry textbooks, clothes for a weekend, etc. Ideally, I would love as much storage space outside of the camera compartment as possible, as well as be able to hold my photo stuff(Canon Rebel XT, 17-85 lens, telephoto lens, and flash). Can anyone recommend a good backpack that might meet these requirements. I have not found one yet, but I can't imagine that there is not someone else out there in my situation.