Reason why he was carrying cash, according to the story, was that he's experienced problems withdrawing cash on an out of state bank account. I would expect there to be similar issues cashing a $10,000+ money order.
It is really contemplative discussing how to transport large sums of cash or equivalents without it being stolen by law enforcement.
How about Traveler's checks? Aren't they supposed to eliminate that problem?
You could get one of those shaving cream cans with the fake compartment in the bottom.