I grew up in Delta near Point Roberts. It's a part of America located on the southern end of a peninsula, the rest of which, is part of British Columbia. They have an elementary school but not a high school in point roberts. So, when I was in high school, most of the people from Point Roberts would be bussed into Tsawwassen but we had a bus that would bring a few of them to the high school I went to.

That seems like a perfect area that could be part of your land exchange idea. All the teenagers there end up going to school in Canada anyway. There's only one crossing between Point Roberts and Canada.