[10brakelight]

IMO if you're going to bother with snow tires, go all out and go studded. Normal snow tires ARE better in snow than all-seasons, but not enough for me to care. Studded snows mean you can entirely stop caring about low-speed icy performance, which tends to be the biggest problem. Studs provide enough grip on ice that you can fully stop and restart on hills you'd otherwise have to rely on momentum to get up.

I personally have never put snow tires on a caravan in New England, and my driveway is bad enough that many people can't drive out of it. Depending on how experienced/skilled you and the other people driving the vehicle may be with snow, YMMV. I certainly wouldn't encourage everyone to drive that way.