If you're driving around with enough marijuana to create a detectable trail of odor that follows your car around, it seems somewhat likely that law enforcement might intervene:
The deputy conducted a traffic stop on the vehicle at the corner of Redwood Drive and Alderpoint Road, Garberville. The deputy contacted the driver of the Suburban who identified himself as James Walter Coomes , 39 years old from Tuscon [sic], Arizona. The deputy explained to Coomes why he stopped him and searched Coomes trailer and vehicle.
Inside the trailer the deputy located 92 large cardboard boxes filled with marijuana bud. The marijuana is estimated to weigh over 250 pounds. The deputy also located approximately $10,000.00 in cash, and two money orders for $1,000.00 each. Coomes was arrested and booked into the Humboldt Correctional facility on charges of possession and transportation of marijuana for sale. His bail is set at $50,000.00.