Declare it!!
I have seen some pretty thorough searches in my trucken days, example: I was a young driver going out thru port huron and pulled up to get checked..customs: what do you have on? [ I was empty ] I said
" A LOAD OF POT".PULL IT AROUND BACK SAID CUSTOMS. YOU SHOULD SEE HOW WELL THEY SERCH, EVEN THOUGH I TOLD THEM I WAS JUST KIDDING
