Here is the perfect solution! Since the camera tray will slide towards the back, it is impossible to take out the camera without noticing the backpack straps. A 5D MIII with 2.8 / 24-70 fit in easily.
The backpack is processed surprisingly robust - and I say that even though I wear normally Lowepro and am therefore spoiled accordingly, in terms of quality.
Summary: The thing about the award: sensational!