How does Jessica avoid the cameras?

In Chapter 11, Jessie continues to evade the cameras and make her way to the guardhouse. The guard is busy because a family in a car has just driven up to his post. The family comments on the guards "weird" clothing and Jessie is personally offended. She thinks that the villagers' clothing is very normal. Finally the guard lets the car through. Jessie decides to follow a car or truck through the park entrance. She waits for a while for the perfect vehicle to follow, and finally sees a bread truck stop in front of the guardhouse. The driver leaves his truck to speak with the guard. The two speak about baseball, but Jessie does not understand what they are talking about. She uses the opportunity to sneak into the back of the bread truck. Finally the bread truck starts and Jessie is taken out of Clifton. She is very excited, but realizes that she does not know how to get out of the moving truck.