I would have be sorely tempted to answer in the thickest "Beverly Hillbillies" accent I could muster. "Course they ain't locked and course' the younguns can get em! How's 7 year old Billy-Bob and 10 Year old Bubba suppose to fend off the revenuers and hunt their supper, while's we on our trip way up north?"
Hubby was all for arguing with the border guard, but I had to grab his arm ans whisper to him to let it go or we would miss our cruise.