This discussion reminds me of an experience I had at Scranton's Steamtown at Railfest some years ago.
Although my friends and I had a great time all day, we finally got over to the big Union Pacific locomotive and got in line to see the cab. The park service lady cut my small group of 4 in half and said thats it, we close in 5 mins. Her tone was nasty and although it was just 2 more people to go up, she refused. 4pm!!! Really??? We drove from Ohio to go there. Still annoys me.