Yeah it made me a lot of extra cash when I was in high school. I would park over the on-ramp for beach access and wait for a tourist to inevitably get stuck. Most of the time I wouldn’t ask for money but they’d give me a nice tip since they knew the only other option was to call a tow truck. The park service requires a permit to off road now, and that info is on the permit so fortunately for visitors it happens less often now.