This might not help you, and it might throw your season poll off, but a few years back, a pilot I worked with in northern alberta was out with a forestry crew in november and spotted some smoke, and found it to be a tree stump smouldering. They planned on going out the next day to put it out with a crew, but were delayed by three days due to heavy snowfall. Once they finally went out, they found that not only had the fire kept smouldering during the snowfall, but it also got bigger. I guess some fires, just don't want to quit out of season....
The pilot is a member on here, if he see's this he may be able to add better details.
There was also a fire early on in the season near hinton alberta where they couldn't bucket because there was ice still on all the lakes, (maybe some guys might have more info on that too).