Over the last couple of days I have been doing a traverse of the Carnedds with one of my daughters. I decided to try and leave the car at one of the two camp sites (Uchaf and Isaf), rather than do what I usually do park behind Joe Browns and walk. However, both sites specifically exclude overnight parking, although they are happy to charge you to park for a day.
Is this some daft planning regulation, or is there some other reason? Seems strange you can park during the day, or camp and wander off leaving your tent for several days, but not just leave your car.