The more printed paperwork you have the better! Why not? Its just a little piece of paper. You think the airline staff like us handing them a cell phone with the screen going on and off to fumble around or the battery goes dead or no signal. I have seen it happen at the counter. All those airline and other officials want to see it in hand and the more official seals and stamps the better too! I know eco friendly is no paper but come on. If you go to the AirPort think anything is BS I think your odds of having problems it greatly higher!! IMO. why not go fully prepared. Traveling is not that hard unless you make it hard, EZPZ