Officiall the campfire and singalong begin at 7pm, though when we visited last monday the fires for marshmallow roasting were going at 6:45. It was surprisingly uncrowded considering it was Christmas week, but perhaps the cool evening scared some people off (we're from NJ so we didn't think it was too cold!)
The guitarist begins the singalong at 7pm, Chip & Dale stop by shortly thereafter and stay for about 20 minutes. The singalong ends at 7:30 and the movie begins at 7:40. Simple food and drink (pizza, hotdogs, nachos, soda, beer) are available for purchase at the Chuckwagon (where you can also purchase your roasting sticks and S'mores kits).