I know some people will knock this, but I do have some suggestions INSTEAD of using a bank box.
There are indoor storage facilities, with different size accommodations. Mine has 65 cameras on each floor. You need a code to get into the bay area. You need a code to get into the
area where the carts are. You need a code to get onto the elevator. There's a camera in there, too. It's patrolled at night by a security company, and has indoor and perimeter sensors for lighting. Pay in cash or check every month.
You can also use a Bus Depot Locker.
You can use a Bowling Alley Locker.
You could just dig a hole. (I no longer like getting my hands dirty)
**Feel free to add your suggestions.
Sometimes you just have to be creative and think outside the bank box. Best of luck all !!!