It suprises me that nobody has taken a scanner to the top of Tikaboo Peak and scanned frequencies for Area51.
For those who don't know, Tikaboo Peak is the only 'legal' location where you can actually SEE Area 51.
UFO Hunters did this in Season 2, Episode 13 (probably the newest Area 51 doco). They took a HD camera too the peak of the mountain and filmed all sorts of activity, including the aircraft morning fly in for the workers.
Thanks