I now housed in the "main course":
Canon 7D + CANON BG-E7 (Battery grip)
Canon EF 70-200mm IS II USM F2.8L
Canon EF 50mm f / 1.8 II
Canon EF-S 15-85mm f / 3.5-5.6 IS USM
Canon EF-S 10-18mm f / 4.5-5.6 IS STM
Sigma APO Tele Converter 2x DG - AF
Canon EX 430 Flashlight
In the upper part I still housed a few batteries, memory cards, etc.. But here is now still room for a small lunch box and have a drink :)
In the rear compartment, I have placed my iPad.
Front of the tray a few cables.
If I want, I can leave the 70-200mm also on the camera, then I have to take out only the central part and am finished. I have a few pictures of my division attached to you as an image. I hope they help you in the setup of the backpack.