Though given some of the tales from my in-laws CBSA doesn't seem to have been as strigent in years gone upto and including, not noticing the coffee table tied to the car roof...
That must have made for an interesting story!

Speaking of interesting CBSA stories.... My Dad is a telescope maker. He'd built a large trailer-mounted 22-Inch telescope in the early 80's, and the border officers didn't quite know what to make of it. The large tube was painted in bright colours and almost conveyed the looks of a circus canon. It's one thing to handle things that are common, but if something is unique, it completely throws them off. They'd asked him to pull off to the side so that they could figure out how to handle this case, but once they were satisfied it posed no threat, they allowed him through. When he got to his destination, ie the same place I'd been to this past week, it was one of the first telescopes to offer up views of Halley's Comet.
That telescope can be seen here https://en.wikipedia.org/wiki/Star_party
Another related story featuring this telescope, featured him driving down the highway while another man in another vehicle rolled down his window to ask what it was, and after being told it was a telescope, he slowed down to get a better look, then sped back up and he had more to say. He thought it was so big it couldn't possibly be a telescope, that my Dad was pulling his leg.