@Maxwell - as project over the astral you see hundreds, no perhaps thousends of shipping containers and wooden crates. It is not difficult to spot the crate you are looking for. Physical things appear blurred but the deepweed it is appears real in the astral and glows with many colors. You can also spot several groups of guards patrolling the perimeter to prevent the exact kind of burglary you are going to attempt.
Back on the physical plane, we are talking about a fenced flat and barely lit cargo hall, with a maze of shipping containers and crates. Security cameras seem to be present in many of the angles, but relative to the area they cover the number of patrolling guards is minimal.
@Serge, You feel safer with two spirits manifesting and looking at you in the astral. That said, after an hour or so, some of the security camera's suddenly go offline. You find yourself completely blind into both the west and the north sides of the building. Something is going on you can almost feel it.