For a while now I have been playing with the Improvised backpacks and realised that there is some more scope for another step of crafting. If you snap off some twigs from a bush and add it to your Improvised Backpack it can add some more camouflage, much like adding grass to the mosin wrap.
The uploaded image I made on my phone is just a simple visual to show where the twigs with leaves etc and grass would be woven into...under the existing ropes. This would be a realistic addition to the backpacks to add some camouflage to the back of it.
Just an idea I had so I'm throwing it out here.