Hey - We have been once. Its a basic set-up that has a campfire for roasting marshmallows to make smores (bring your own or you can buy kits at the chuck-wagon) There's a stage and an outdoor movie screen. My kids actually won a dream and got to go "backstage" with Chip and Dale for 5 minutes worth of pictures and hugs then up on stage to kick off the campfire. Next, a CM leads the group through several campfire songs while Chip and Dale make their way through the crowd. Then they leave, and the movie starts. In all the Chip and Dale part only last 20 to 30 minutes but watching a movie outside is kinda fun - much like the old drive ins.
The link sums it up pretty well and is consistent with our experience