Usually when they go on a field trip like that in this type of camp, the have more than enough staff ( and often volunteer parents) to keep track of the kids. When she didn't show up, they did think it was unusual but thought she must have a good reason. I'm sure there was a LOT of preparation like putting sunscreen on kids, making sure they had the proper paperwork , such as permission slips and emergency contact info, etc. Then there's loading kids into the bus, counting them, kids having to go to the bathroom, someone forgetting money for the trip, and all kinds of things to do. They tried to contact Mollie but got no answer. Maybe when they had already arrived at the fair. Not sure of the time. At that point they were concerned and called the boyfriend.