Question : Know any medium size travel backpacks with locking zippers?

I’m traveling to Ecuador for a month with a Spanish class. We’ll be out in the the open (Amazon river basin, mountains, flat-lands, beech, etc.) for up to eight hours at a time. I need a backpack that can hold a Canon Rebel, extra lens, a notebook, and some other random small things… I would prefer it to be waterproof… does anyone know where I can find something like that?

Any suggestions?

Best answer:

Look here http://www.google.gr/search?q=backpacks+&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:el:official&client=firefox-a