Note that Groom Lake gets federal holidays off. In theory, they will not be flying the 737s Monday (2/18/2013).
Now there is a theory that the best time to do a "test" is on weekends and federal holidays, which is when there are fewer employees on base.
Remember that even if you work at Groom, you can't see everything.
Having been on TIkaboo on weekends and weekdays, I rather be there on a weekday. ;-) This is not to say you can't learn stuff about the base while
watching it on the weekend.
If you can stand the heat or cold (as the case may be), the best time to see something around the range that is Groom related is the last two weeks of
June and the last two weeks of December, provided no flag exercise is scheduled. That is because Nellis Weapons School is not active during those two
week stretches. Those periods are the best times to scan for Groom Lake frequencies since there is no Nellis related chatter. If you are in this two
week period and there is no moon, tests are very likely.
Regarding walking around the border at night, especially at the front gate where there are always camo dudes, you should first familiarize yourself
with the border during daylight hours. The dudes get a little antsy when you wander around at night and will track you with a spot light. I have seen
them fire up the red and blue "cop" lights they have behind the front grille if you approach at night. This is to signal their presence.
If you are by the border at night, they will watch you all night long. For their report, they need to get your license plate number, which somehow
gets relayed to the Lincoln County Sheriff Department. I have had the dudes wait by the road to get my plate. This was not at the front back but
rather in the hills near the back gate. Clearly they had a camera parked on me because as soon as I got out of the car to er um you know, I could hear
the dude mobile driving and then park at the intersection to get my plate. Either they have cameras that I don't know about or they can set up
portable surveillance on the fly.
There are spots around the range where you can't be seen from Bald Mountain. I think this is one of them.
If I have the right spot, there is a camp site there. The dudes would be forced to park nearby and watch you all night.
If you use this google earth overlay, the green area is where they can see you from Bald Mountain. The areas near the border that are not green may or
may not have local camera.
Link should open google earth