Unless it is a movie premiere or some other type of celebrity outlet, there just aren't any paps in vegas...or if they are around, they are very low key. We don't have that chase thru the streets, traffic jam, cameras everywhere type of experience that parts of LA seem to have. During this trip, the media is hanging out where he is staying, when he leaves, so do they - and the chase is off.
The Vegas house had media around his birthday, but they disappeared or faded away. I haven't heard of any car chases involving MJ and the media in Vegas...or any celebrity and the media. For some reason, it just doesn't happen.