Heading the other way, we cruised for several weeks in the North Channel of Lake Huron. The Canadians & officials were especially polite and accommodating. We had the nicest time. I hear the US MIB can be a bit odd coming to the US even for citizens. They did materialize from nowhere once but never boarded. We run AIS
class B so I feel they all know who we are miles before we see them. We were never boarded by either side the entire trip. This was also true last summer as we transited the St Mary's & Soo Locks. You necessarily cross the boarder a few times under way. We never even saw police, sheriff or CG.
There have been a lot of complaints along some of the lake Erie, Ontario
shores in recent years. In Ohio
, it was deemed inordinate harassment and the courts ordered the locals to quit bothering boaters without probable cause. Some boats were stopped as meany as 5 times in one day on a coastal (power boat) cruise
at every city passed. The legislature of at least Ohio
was planning law changes that would restrict the village water
Sure hope your experience is as great as ours.