Once you make the first kill, the enemies may become alert, but a stealthy kill using throwing knives lets them be undetected. Make sure you avoid broken glass, as that will place the enemies on full alert - such glass is seen as a white spot on the grayish floor, or can be confirmed properly with a flashlight. You will need to kill them, and the safest way to do so is to sneak around the far side of the room. In this room are several bandits that have setup a barricade.
Collect his ammo, and proceed to the next room. When you approach the darkened room, hide in the corner as instructed, and wait for that wandering guard to get taken out. Avoid both the cans, glass and tripwire that are visible. Collect all ammo from them, and follow Bourbon to the right. Beyond the wrecked train cart will be a dead caravan group. There is also a path to the left with some ammo cache but also lurkers. Further along, Bourbon will comment about the pipes containing the voices of the dead, which you may be able to listen to. There will be a bat scare further along, where you can find a dead body with a few clips of ammo. Aside from a single lurker who will run away, there is not much threat from mutants.
