Hi, a few years ago, we went to the Balloon Fiesta. I had both vents open as I was eating my dinner. I heard a flop or flap type noise, [it was windy] my rear vent cover blew off. One of the other Airstreamers there had one of these ladders and let me borrow it. I was able to get on top of my trailer and duct tape the broken vent cover in place. I was panicking and my wife didn't really understand why. That night, [only a few hours later] the rains came and it stormed for hours. It wouldn't have been a pretty picture, in the rain, with out a vent cover above our bed. This ladder and fellow camper saved the day.