From the outside of the caravaneer barracks, when standing in front of the door west of the brahmin pen, the barracks appear to have an L-shape bending to the left, but when you enter, the interior L-shape bends to the right. Entering the door will also turn your compass 180 degrees, and you will be facing east instead of west, with the same reversal upon exiting. This is probably an oversight of the designers.
Since the Crimson Caravan Company is affiliated with the NCR, entering the compound dressed as a Legionary, Great Khan, or a Brotherhood of Steel member, or failing Don't Tread on the Bear! by siding with the Legion, will cause the guards to turn hostile and attack. Killing the guards will cause you to gain infamy with the NCR.
Fiends in the surrounding area outside may wander close by and possibly follow you into the compound, but are typically dispatched by the occupants.