There is also a Church Micro in Warnham (#20 so one of the originals!), a Cricket Pitch Micro (#23) near the given parking coordinates, and a few caches named after cartoon characters which you can collect in between these ones. Note: some paths can get very muddy at times so appropriate footwear recommended.
There is plenty of parking on street in Warnham or at the Village Hall (see Additional Waypoint).
This first cache is in the village so the hint is quite specific to avoid you needing to act too suspiciously, in case it's not obvious on arrival. Cache is bigger than a nano but smaller than a micro.