The minstrel's song at the end of the episode was originally 20 to 30 minutes long, but was cut down to less than a minute.
On the DVD audio commentary for "The Magic Bush", Trey Parker and Matt Stone reveal the origin of the episode. After talking about drones, Parker decided to get one. He flew it around in his backyard, thought it was "pretty sweet", and put it away, with the intent to never touch it again. After showing Stone the footage he recorded, the two discussed how it is cool that "you can see everything" in the neighborhood, but "what else are you [really] gonna do with it". The idea that all one can do with a drone is spy on their neighbors was a theme in the episode.
The drone the boys use is called "Specter 2.0 Eagle Sight+" - a spoof on the popular model made by DJI, which is called "Phantom 2.0 Vision+" and looks very much like the drone in the show.