Like Perry in BC, Canada. here in Ontario Canada we also have to run with 2 plates.
And as Perry notes, and I'm in a similar position, living on the Canada/USA border....both the US and Canada Customs./ Immigration personnel need to see that front plate to log you into the 'big machine'.
When I'm in the States for any length of time....days...I remove the front plate....for cooling.
One of these days I'm going to buy one of those spiffy electric plate rotators that I've seen advertised in 'Street Rodder' magazine.
Those old Rodders seem to have a gizmo for everything.
My plate is presently mounted over the
oil cooler opening on the 427......don't need to much
oil cooling here in Canada.....only got it up to 142 degrees one time......it was then that I realised the
oil temp gauge actually worked.
Mike