Take something FULLY manual which can operate with no batteries. Nikon and Pentax are both great for cold weather work. Then you can use a small pocket light meter which you can keep warm at all times. (It's the cold which lowers battery output - they're not actually flat, but they might as well be!)
In -30C and below, film is prone to shattering, so try and load in moderate cold, rather than normal 20C room temperatures. Avoid high-power motor drives and auto-rewind.
Assuming Antarctica is covered in snow... you'll probably want a pretty fast film, 100 ISO or thereabouts is probably good - this depends on the time of year and light intensity (obviously).
I can't re-iterate enough that you need a camera which will fire with no battery power. The watch type batteries which are used to power the light meter are exceptionally prone to low-temperature non-operation and they're not possible to change in protective cold-weather gear. AA batteries can at least be kept in your inner layers.
I'm sure there's more people here who can help - we've got some Canadians who are regularly out in scary low temperatures.
Rob