Are you clever? If you are a clever person who was knowingly going to transport an illegal substance across the country in order to sell that substance, in your classic Piper Comanche airplane, how would you handle the preparations, such as notifying contacts that you were heading out? Once you've answered, see if it matches with the following, or if this would even remotely fit into your scenario.
Via timesherald.com (PA):
Though Handzus [the accused criminal] did not file flight plans before piloting the aircraft on the 2,400 mile trip, investigators had seen his Facebook page and learned of his travel plans. And on the day the two landed at Blue Bell airport, detectives spotted the vintage blue Piper airplane.