It's not difficult to watch a busy truck stop, especially at night. You rent a small truck, drive in, and park. Traffic being what it is, you can leave a truck in the parking lot for up to twelve hours without attracting suspicion. This is my third weekend watching Jolly Jim's. I don't mind working weekends.
Some people like to spend their weekends gardening.
Some people like to watch or play sports. Through my palm-sized binoculars, I study the enthusiasm with which the Jolly Jim staff carry themselves under the fuel island floodlights, and I watch their demeanor in the presence of the ubiquitous Melissa Willard. She wears the same khaki trousers and blue windbreaker the employees have to wear and she works alongside them when she is needed, but I've studied enough organizations that I recognize power relationships on sight. The employees respect her and trust her. She has been here working all evening, even though it is Sunday.