There's a conspicuous blimp that flies about sixty miles to the north. I'm not sure of drones. I camp out there a lot and have never seen them.
[edit] it's an aerostat, not a blimp:
Fort Huachuca is about fifteen miles to the north and
"is home to a radar-equipped aerostat, one of a series maintained for the Drug Enforcement Administration by Lockheed Martin. The aerostat is based northeast of Garden Canyon and, when extended, supports the DEA drug interdiction mission by detecting low-flying aircraft attempting to penetrate the United States."
The blimp is out of Ft Huachuca and it is equipped with cameras, and there is a drone unit stationed there also. I sold some test equipment there in 1999 to TRW, now named something else.
The MQ-1 has a wingspan of two dozen feet, and a service ceiling of 26,000 feet. (ten thousand feet lower than a 747) It's also got a pretty tinny piston engine, with a fairly distinctive sound.
Think more "cessna with missiles" than "RC plane".
[edit] it's an aerostat, not a blimp: Fort Huachuca is about fifteen miles to the north and "is home to a radar-equipped aerostat, one of a series maintained for the Drug Enforcement Administration by Lockheed Martin. The aerostat is based northeast of Garden Canyon and, when extended, supports the DEA drug interdiction mission by detecting low-flying aircraft attempting to penetrate the United States."
http://en.wikipedia.org/wiki/Fort_Huachuca