Thanks Everyone!

hd302: I already have my EZE-LGA tickets whick I found very cheap (2200 business return)
Changing them or going to Montreal and renting there disrupts a little my itinerary...

arf04: reading "None of the highways you will be on require that kind of traction as they are mostly flat or have gentle grades (even in the mountains)." and "crews get out very quickly" is the info that I needed, as I thought that near Mont Tremblant or Lake Placid I could find worst mantained/steeper grades.

Critic: "Last year was a pretty mild winter, and they're saying this year will be more of the same"

I found 2 places where I can buy and install winter tires for under $400, and they store the originals. Trying to see if they buy the used ones with 3000 miles when I put back the all seasons...

So seeing all this, I think that will decide in January if I go with All Seasons or switch to Winter depending on what already happened and the extended forecast in Quebec

Thanks again!
Edgardo