The campfire is at the Meadows which is the main pool area at Ft Wilderness. When we went last month we parked at the outpost parking area, took the bus to the Meadows and walked past the pool to the campfire (I think it is poorly marked, so don't be afraid to ask directions). We bought smore fixins at the snack building (it was $5 for a bag of marshmallows, Hershey bar and single pkg of graham crackers plus 2 sticks for roasting). You can buy extra sticks (they are actually dowels) for .33 each. There is about 40 minutes from the time the event begins and the movie starts. In that time, we roasted marshmallows, sang along with Ms. Sundee and had a greet time with Chip and Dale.
Since we were there in Sept (before the time change) the campfire started at 8 pm and the chuck wagon stayed open until 10 pm.
I think a flashlight would be a good idea. There are paved paths, but they are not well lit. We definitely used and needed bug repellent. There is a drinking fountain beside the chuck wagon (there were small cups set out with the napkins) and there was a path behind the wagon that led to the restrooms.