Greg-
Thanks for the reply, but I don't want to add a 3rd car to the stable.
Although I am not opposed to putting snow tires on the Prius if needed. (never needed them before, but it couldn't hurt)
Valerie-
Would appreciate you asking

Specifically, I am very comfortable driving in the snow in NH (have 15+ years doing so) But heard The traction control in the Prius cuts off power to the wheels completely if it senses major tire spinning. I see that as a possible danger if it strands you in the middle of an icy intersection or road with traffic closing in on you.