Re: Non-scientific jobs in Antarctica
American and Commonwealth bases sometimes accept Canadians, but generally for skills that are harder to find. Unfortunately for cooks, there are lots of applicants for the cook positions, which means that the various programs will generally first consider their own nationals for such a position.
Cooks also tend to have fewer chances to see much, as their job keeps them in the kitchen or close by. Occasionally they might work at a field camp in the summer, but about the only job worse in this respect is as a janitor or dish washer - which is only available at a couple large stations anyway.
Do you have any other skills that might be useful? The mechanical trades are probably the easiest way to go, as there is less competition among those who have the skills.
If you want to go as a cook AND see more than one base, you might do best with a private expedition - but they will have probably already given that position to someone they know.