Fixed wing guys do it all the time - you could try their forums, or ask the guys in a Canadian forum - try
www.caaviation.ca
The trip from the States to Canada will be easy enough. One thing i would try is get in touch with people like Great Slave - most companies have fuel caches all over the place, and they might be able to allow you to use them, or better yet tell you who delivers the drums (you can get 17 in a Twin otter) - Ken Borek Aviation in Calgary would be a good start. Then you could establish your own cache - but always plan to land with enough loiter fuel to find it!
The Canadian telephone directory web site is
www.canada411.ca
If you get weathered in in Iqaluit (frobisher Bay, on Baffin island), be prepared to like Broccoli - it's about the only vegetable they have. The hotel is good, though, with the inevitable Chinese restaurant. There is a bank there at which you can use a bank card, and a runway you can land a 737 on.
You will need some fan heaters for the engine compartment and cockpit (not too near the windows!) and you should leave them on all night. Don't forget the engine muffler, but we found that rotor covers just get frozen to the blades and were hard to get off, so we didn't bother in the end.
Good luck!
Phil