If you haven't already or you are starting here, please read all the information posted in the description of the 1st hide in this series (Kev's Containers No. 1 : Masonvale).
This cache brings you near the RAC. However, it is not hidden close to the building as there is a constant flow of muggles going to the gym, catching the Mason Shuttle that picks up here, and drivers driving. Not to mention the foot traffic. With this in mind, it is hidden near the turf field but there is still a chance of muggles spotting you