From what I've seen the area is broken beyond belief. I get bombarded despite despite it saying i'm hidden, they somehow know im near them despite the fact that it's night and I have a stealth boy on (and near the the train tracks that enter the area from the south no less), plus they seem to possess some sort of x-ray vision as they always seem to hit me when i'm behind the rocks covering the tracks. Basically, I want to enter the area without setting anything off.