NEVERstore anything of value in a box blind.

I'm sad to hear this happened to you.
In our neck of East Texas it is a given the night walkers are going to break in your blind just to see what you have. If you leave anything of value it will disappear.

I built a locking mechanism out of solid steel plates for our stands. We have sliding doors and one portion of steel plate slides into another, then the padlock locks it in place.
Since my doors are not loner an entry option they have gone to ripping open the windows just to poke their head in and see what they are missing.
If you use a regular hinge style locking mechanism they will rip the door at the lock, those won't hold out a poachers infant (they start them young ).

I'm sorry this has happened to you, may the culprit step on a rusty nail[&:]