It used to be if you had 5o hours on floats and went to the deepest regions of the armpit (Pickle Lake,Armstrong,Pine Dock, Gods Lake Narrows) you could find something, now it seems this is not enough anymore unfortunately.
Buffalo Airways out of Hay River would take you off the ramp eventually. I have two friends and know of others that just kept showing up there every day until Joe put them to work. They worked their butts off for 6 and 9 months respectively in delightful conditions. But, they both went right seat on the DC3.I don't know if this is the cae anymore though.
For that you would need a multi IFR and and to write your IATRA. If you are building the time between your private and commercial I recommend doing as much as you can afford on floats if that is what you want as a carreer. Any other build time at night (and winter in canada allows for a lot) for the night PIC-good for you're ATPL later.
The post earlier suggesting picking a spot and concentrating on it is good. If you make contact and hang about it's probably better than the drive by shooting approach.
Other than that. best of luck, you could check out the canadian aviation chat site "www.avcanada.ca" also.