Bridgestone LM-22 is a candidate.

 What flavor of Canada - Urban near the border, or way north?

 When do you plan to go back?  (still Winter, Spring, Summer?)

 This came up before recently, and the best suggestion I heard was
wait for the weather forecast to be mild, switch to all season tires
at home, bring a set of chains just in case, and then stick to plowed
major highways and watch out for Black Ice till you get to the warmer
spaces south of the Mason-Dixon Line.

 Full on snows are AFAIK totally incompatible with even lukewarm
weather.  You'll chew the tread off in no time.

 There are supposed to be some special Snows made that have a harder
compound underneath, meant for one years' use - when summer comes the
soft compound chews off, then you drive the summer on the hard
compound, then you buy new snows again in the fall.  But that concept
sounds like a total waste to me, and wouldn't work for you.

 Another thought:  Can you change tires along the way, and then ship
the snow tires home?  You'd need to....  Nevermind.  Fuhgeddaboudit.
You'd have to do it just north of the border - shipping them back from
the States is out.  Canadian Customs would certainly bollix that up,
unless there was an exemption you could quote on the shipping forms
you'd have to pay duties to import your own used snow tires.

 Trailer hitch and small trailer?  Switch tires along the way, throw
the snows on the trailer and tie them down, and park the trailer for
the duration when you get to Florida.   Extra advantage being you can
probably buy good tires in the States cheaper, even after the exchange
rate.

 The trailer would also be useful for hauling home any Stuff you find
along the way that won't fit in the trunk.  And I won't go into what
kinds of Stuff, because people collect everything imaginable under the
sun - and then some.  If you or your spouse collect heavy Stuff like
steel anvils or cast iron wood stoves, it should of course be a very
stout trailer...    ;-P

     --<< Bruce >>--