The biggest/nicest trade show booths I've seen was at a wholesale/retail shows. Once in Atlanta while working for Russell, I went to a show. Don't remember the name. Companies like Nike had very nice booths. they were small compared to that larger one below, but they would do a 2nd story. The entrance and exits had checkpoints. You couldn't get in to see there stuff unless you had a buyers tag (and were pre registered customer). If not, you had to go into a small room and and get interviewed first. Then, someone would walk you through their product inside.