I wish I had a powerful enough DLP projector to go with the new Airscreen. The Airscreen is an inflatable projection screen that can handle images up to 100-feet by 50-feet. According to the manufacturer, it takes an hour to set up and 30 minutes to bring down. We say use a big nail and you can take it down in 5 minutes, but that's a one-time option.
If you've got the space for it, you can put the Airscreen up without any additional supports. It's a complete, stand-alone screen with its own weights and supports. I know the drive-in went by the wayside, but maybe the Airscreen can help bring it back. I can see it now: fourteen folks hiding in the back of Hummer trying to sneak in to a digital drive in!