Buy digital camera backpack BEST buy Lowepro SlingShot The Fastpack line is good if you don't like the uneven stress on shoulders Lowepro SlingShot 100 All-Weather Digital Camera Backpack (Black)
The unique design of the SlingShot 100 AW provides quick and easy access to camera bag while still being worn. Perfect for camera backpack
I have the Slingshot 200 AW and 300 AW. I modified the interiors using stick-on velcro so that I can carry a big lens across the width, on top of a flash--and get to both from the side, without opening all the way. Very convenient. However, it's a pain to carry for very long, as it puts all the weight on one shoulder. I've switched to a Think Tank Rotation 360 and their belt system because of this. See more detail for Lowepro slingshot
Buy Canon camera bags BEST buy Canon backpack 200EG Canon Deluxe Photo Backpack 200EG for Canon EOS SLR Cameras (Black with Green Accent)
I still love this bag. I use it quite often. In my opinion you really can't beat the price. I should be doing an update video soon.This Canon Back Pack (as far as I know) holds much more than the Lowepro.The bags description from it's tag states that it can hold 1-2 bodies, 3-4 lenses and accessories. So I definitely think it would hold all of your gear for you. The lowerpro is designed to swing right around from your back to your chest so you can easily take out your gear. BUT, it doesn't hold as much gear as this Canon BackPack.