Canada: Question regarding EIC flight options for smooth arrival

Hey guys,

I just have a small question but none the less important question about how people travelling to Canada under the EIC are booking their flights. By that I mean is it considered adequate, providing you have your Letter Of Introduction for your entry to Canada, to book a one way flight. I have seen various disputes to what people think is accepted and so on. Outside of requiring proof of a return flight to show to customs how are people booking? I have looked at open ended return but the cost is pretty substantial where as looking at a return flight for a year from now doesn't appear to be supported by many airlines.
Will a one way ticket be sufficient or will I need proof of flights in some form of a return ticket?

Thanks guys.