I might not be around to get an answer to this, but…
During the Vietnam War, a lot of Americans moved to Canada. It seems like it was a popular thing to do. How did they do it? Did they go through Canadian Immigration and get refugee status? Did they go as illegals? Did Canada say, “Come on up!”?
A friend of mine wanted to move to Canada a few years ago. He rented a house, and he runs a web-based business so he would not have been taking a job away from a Canadian. He had a contact up there who would vouch for him, and who would say (truthfully) that they are business partners. So he loaded up a truck and headed for the west coast. Although I told him he should go through Canadian Immigration, he said that since he had a place to live, a job, and a letter that verified that he has a job, he was turned back at the border. Now he occasionally gets pulled in when he wants to visit Canada, and he thinks that his information pops up as a possible illegal immigrant (although he no longer intends to move there).
So how did the “draft evaders” manage to move there and stay there for years and years?