And it's not just the Scouts or Guides. I had two sons grow up in the Air Cadets. In their squadron of maybe a hundred kids, there must have been about 30-40 different ethnic/national backgrounds represented. Canada, and especially Toronto and Vancouver, are very diverse, very international places now.

In the 90s, their squadron went on official bus trips to the Wright-Patterson AFB in Dayton, OH, as well as the naval base in Norfolk, VA. They simply carried their citizenship cards or birth certificates with them, and there was never any problem. Now, I'm really not sure if trips like this would be a good idea idea at all.