There are a lot of geographical challenges to making the Canada/US border 100% secure. I remember meeting some Americans on Pelee Island who regularly beach their boat on the southern shore of the island, spend the day fishing, then return to Ohio without ever calling in at any checkpoints on either side. Given the number of unmonitored areas on the border, the fact that it runs through some towns (in some cases through buildings) and the amount of cross-border trade and tourism, the best security option would be to establish a common perimeter around both countries.
“Given the number of unmonitored areas on the border, the fact that it runs through some towns (in some cases through buildings) and the amount of cross-border trade and tourism, the best security option would be to establish a common perimeter around both countries.”
Where I come from, people walk or boat back and forth regularly, often without observing the niceties of border control. Winter doesn’t slow things down at all, in fact, it makes it easier in many spots. My wife’s people were frostbacks, walked across the Ste. Croix from NB in the dead of winter!