When it comes to a brand which offers great camera backpacks, I only have F-Stop and Lowepro in mind.
Lowepro recently updated its product range by two interesting camera bags. The ProTactic and the Pro Trekker series.
As the name suggest, the ProTactic is inspired by tactical bags and offers a molle system for multiple accessory attachment points and an exra pocket for your laptop.
The ProTrekker is more outdoor related to provide long-wearing comfort and large capacity and has an exra side pocket for an hydration system.
Both bags have tons of extras, built-in all weather cover and are made of heavy nylon and Cordura. The Tactic and the Trekke rare savailable in two sizes.