If you are worried, buy and sell the gold in Canada and keep the proceeds and the physical gold in your safety deposit box, it's not like you'd be losing a fortune in interest or anything. You would be wise to keep any of the proceeds from gold sales in Cdn$ and convert it to US$ as you need it.
That sounds like a possibility EZ..
I own some bullion in my Goldcorp account (British Jersey Isles). Had to fill out paperwork up the wazoo. Recently sold some and got a call from my local bank inquiring as to the transaction. Should have stayed below the $10,000 limit.
It is becoming more and more difficult to hide from "THE MAN"