I was glancing through old threads and decided to bump this one for other players who might not know about some of the subtleties of concealment in DayZ.
I have a ghillie at the moment, so the issue of backpack exposure is not a problem
I'd like to know if there is an answer to deranger's question; re: the czech vest pouch. I've come across it a few times and wondered what the point of it was. If the benefit was added concealment in grass, then I can see it being of tactical use in the way deranger described.