The outside pockets and accessible from the rear pockets offer enough space for meals and drinks bottles. The holder for the tripod is very well thought out.
In order to understand the correct belt guide for the vendor's tray, however, I had to look at me on the Youtube videos. The two now loosely dangling on the side straps (times) that can not be usefully employed, and two shots in the back belt (female), I can not connect to each other without compromising the functionality of the flap, left me with a bad feeling, some something not to have understood. :) Here is a little guide might have been effective.
Now I hope that my backpack in the long run will make as much fun as my two Tenba bags that I have for over 20 years. With zippers I'm always a bit skeptical.