Operation Bodybag
this was a method of smuggling people past Imperial patrols, often used on the planet Tatooine during the height of the Galactic Civil War and into the early years of the New Republic. A legitimate individual, often a moisture farmer, would disguise their vehicle as a salvage vehicle. Using chemicals and garbage, they would create noxious fumes in the cargo hold, where they had hidden the people they were trying to smuggle under tarps. If an Imperial patrol stopped them, the farmers would claim that they had found salvage in the desert, and that there had been some dead bodies as well. If the Imperials chose to inspect the cargo hold, they would be assaulted by the smell and see the evidence of "dead" bodies. More often than not, the smell kept the Imperials from further inspections, allowing the farmer to coming on their way.