I wore track suits most of the time - the lined ones - not to hot - not too cold. Also a heavy rain proof jacket and good waterproof hiking boots.
We also took lighter rain jackets but didn't use them. The worst weather was during the day at the Glaciers - it poured but not too cold....and you can run inside for a warm up.
We took hats as well - the trilby kind - they dry out really quickly - unlike a wool toque :o)