I would suggest a hard NO on this.
I'm not able to find an original source on this, but I have read in a couple places that after Executive Order 6102 (making it mostly illegal in the US to own gold), you needed to have a federal agent present, in order to open your safety deposit box. The agent would check for gold in the box.
Here's a non-original source: https://dollarvigilante.com/shemitah-whitepaper/ "In the 1930s, when the US government last confiscated gold, you had to go to your safety deposit box with a federal agent who would check to make sure you did not store gold there. In the event that the government has reason to suspend or close banks, you may risk losing your valuables forever."
Anyone know of an original source on this?