You ought to go through a Border Patrol checkpoint now...
Not only do they have like 12 cameras (facing front and back of the car) and face recognition devices set up, but they check the radiation levels of your vehicle, (you), and have x-ray trucks that can see right through the steel in your car to find whatever they are looking for.
It ain't the good old boy with his drug sniffing dog anymore.
Back in 2004 when i was exiting Az i had my pickup bed loaded to the gunwales with bullets,brass,primers(160,000),dies and such. Most were in labeled manufacturer's boxes labeled with contents....all uncovered. Behind was my 6'x8'x3' open trailer filled also to the gunwales with my powder cache but covered.
Never had a thought about what i was hauling (even when i passed the westbound Border Patrol station outside of Cruces) but when i spotted the distant BP inspection station there at White Sands Nat'l Park it dawned on me this might be a situation.
It was busy.....lots of cars and vans and pickups.....all slowly inching forward. One car ahead was directed off to the right. Many BP agents present and a dog. The handler and dog went to the car that had been directed off.
When i was approached with the customary citizenship ques i answered USA. The young hispanic agent noticed my NavAir ballcap on the passenger seat and we exchanged vet-to-vet salutations. He walked back to the bed (twin cab) and he could plainly see Winchester,Federal,Remington plus magic marker labels reading Nosler,Sierra,Berger,Speer............
He walked backed and asked where i was headed. I told him my destination and that i was moving.
He nodded and again expressed vet-to-vet compliments and i did the same reminding him to be safe.
I felt fortunate.