Geocaching in the Presence of Muggels

As I noted before, I am getting interested in going geocaching. While most people know the term Muggle to refer to a non-magical person in the world of Harry Potter, but in geocaching parlance it refers to anyone not aware of geocaching who might endanger the cache, become suspicious of your activities while you are wondering around looking at your GPS or otherwise looking for the cache, or might find the cache by accident. (Some cache’s have been destroyed by bomb squads after somebody accidentally found it and feared it was a bomb, sometimes it may not go that far but the find may cause problems.)
Anyhow, here is a humor video I found on geocaching in the presence of Muggels.

The video is apparently also a hint to finding geocache GC18WM8.