After the bucket room is a small room where you fight a guy and then you can just go through the door at the top. It should just be a straight walk to the end from there, you gotta dodge past all the fish on the catwalks and reach the door at the top of the room.
I made it past the catwalks and to the room in the Northwest and saw the contents of the refrigerator. I've picked up all I could find but got no clue where to go next. I've retraced my route back outside, but I obviously haven't completed the mission as I can't go back to the campus. Kudos for crafting a game with a cast of characters who are both varied and accepting.