I was just in Vancouver BC, drove up from Seattle, and as far as the West goes, didn't see hide nor hair nor breath of a problem. Those yanks apt to hold a grudge should also remember all the important help we've received from Canada when we really needed it, what goes through my mind is the three embassy hostages rescued by Canada during that little problem with that 'other' member of the axis of evil, Iran. I remember a big sign 'Thank you Canada' on the roads, apropos of nothing.
Meanwhile, even up here in Alaska, we give the ultimate tribute to Canada - we take Canadian change!