I don't understand. A backpack is much more akward to wear and slower than having the camera in a handlebar bag in front of you. A square bar bag is not akward when it's attached to the bars. For hiking, I carry a Lowepro Orion Trekker but on the bike, the bar bag is much better. Even for walks around town, you can attach a shoulder strap to the bar bag and off you go. There's no way I'd ride with a backpack in the first place.