Come on, people. How am I not going to post this?
Gangs are said to sneak the dwarves into the luggage hold, hidden inside baggage.
Then, once the journey has begun, the stowaways are free to rifle through the bags of other passengers without fear of being apprehended.
Before the coach arrives at its destination the dwarves take their loot back into their suitcase, zip themselves inside and wait to be collected by their partners in crime.