This was not staged.
The full snorkel gear is actually the national costume in Norway and everybody wears it. The only change come when they go out for fancy dinner or in the opera, then it's considered polite if they leave the harpoon at home..
Judging by the chairs on the lawn next to this place one can say that they were suited up and waited for the car to come by... true indeed though, if you go on Google maps and put the address up there you can actually see them!
yesterday I saw a different news regarding more or less the same thing in Germany... seems the "google car" is a celebrity in its own right.. People following it, people tracking it, people camping out waiting for it.. its like the reception that the queen would get in the UK or Paris Hilton in the US
GOOGLE SHOULD make this into profit but opening or adding a section to its service: "CLICK to find out what flavor of craziness can be found at this location"