According to long time Metro-Detroit Unit (now SEMAC) members #23311 Richard and Dorothy Sill, their first International Rally was held in a corral in Brandon, Manitoba in July, 1975! There were 4209 Airstreams present for that Rally! It was huge and far away.
The Metro-Detroit Unit created an old Ford car as our float for the annual International Rally Parade. To transport it across the border, into Canada, they had to take it all apart, transport the parts to Canada, and then put it all back together. We entered the car in the parade and won first place! Pictured with the car is Tom Simpson and Don Whitson.