I plan to be in the area in the near future. Based on my itinerary, driving the portion of the 407 ETR between Oakville (the 403) and the 401 would make the most sense. I am from the USA so I will not have a transponder. Can someone give me a ballpark idea how much this would cost? Will they mail me a bill in the US? Could I get a transponder for just a couple of days? My state does not have a plate on the front, will that cause a problem?