The room inspections are basically done to make sure that your apartment isn't a disaster zone, haha. Usually 2 people come in and just check to make sure that the apartment isn't really dirty or that there aren't any of the banned items that they listed upon your arrival there.
They never seemed to care what we had hanging on the walls, so you should be fine. They do ask that you use the 3M strips, if possible, or as few nails as possible. The inspection isn't really something to worry about. Just make sure that your apartment is somewhat clean (things picked up off the floor), trash taken out, not too many dishes in the sink, and you should be fine.