The photos you took on the inside are your best photographic work in my opinion. Of all your stuff, this is my favorite. Compositionally its great, because it almost pulls the viewer into the bars as they gaze further down the hall, drawn by the high contrast rectangular shapes.
I have to believe that your physical vision contributes to the success of these Dachau photos. Specifically, nearsightedness or seeing pariochially may actually have helped in this environment in creating an image which conveyed their crampt confinement.
You might try more photoessays and subjects where there is a tight field of view and getting close to subjects.