I managed to snipe all the guards and MG gunners in camp two and in the two ammo camps, but I've looked in all tents and crates several times and I can't find those documents anywhere. On the ground there's a small transistor radio, but I can't interact with it. What exactly do you mean by the Head Quarter in the camp? I've been everywhere in that camp and even on the farms around it. So any precise help would be very welcome.