Welcome Nancy,
Both Lady & I run the far North, Lady in the Yukon and myself in both the Yukon & NWT. Winter in the south is WAY different than winter in the North. For one there's almost NO light, only 4 hours, then there's the cold...it's nothing like the south, it can be -50 for WEEKS at a time, and that DOESN'T count in the wind. Then in the Yukon there's mountains...REAL mountains, not the bumps in the road you have in Ontario. Running up here is not for the inexperienced, & unfortunately too many inexperienced drivers think it's a piece of cake, it's not. It's cold, extremely isolated & dark. The roads are barely maintained, the weather changes in seconds, there's no truckstops, no showers, no place for anything except a wide spot in the road to sleep. Everything you might possibly need you have to carry with you, cause there's no place to buy it up there. I'm not trying to discourage you, just tell you like it is. If you want to know what the Ice Roads are like, do a search using my name & you will find links to the threads I have posted complete with pictures. Oh, one more thing I forgot, if you want to run in the NWT, unless it's strictly hauling fuel you will HAVE to have your extended length, & that certification is only available after you've had at least 2 years or 150,000 miles of experience.
Here's another link to a very good Ice Road website, it's the REAL thing...NOT the fantasy they have on TV.
http://www.thedieselgypsy.com/Ice%20Roads-3B-Denison.htm
Here's some pictures from the trip to Whitehorse, YT I made on the weekend...THIS past weekend...
And this was on the way to the NWT THREE weeks ago....
Oh, and one last thing...winter can last up to TEN months...it did last year. :-)