With the first hold finished, Rue moved on to the second, while the first Captain went to inform his crew of the "upgrades to security". They would accept the version that he told them, never suspecting that there was more to it.
After all, a Supreme Ranked protective spell on the hold would keep the customs officers honest, and it would be hilarious the first time that one of them collapsed in spiritual agony for attempting to steal during an inspection.
They were all looking forward to it.
None of them were too concerned about their own crew. You had to be somewhere between suicidal and brain-dead to try to steal from the Captain to begin with.
The first Captain went inside to inspect his new layered hold as soon as everyone left, and realized that Rue had not just made one layer, but two. There was the actual ship's hold, an illusionary ship's hold that looked exactly like it, but empty, and a vault themed storage realm.
