Yes, change your tires before you leave. If you only have 1/4" of tread now, they'll be wore out before you get home meaning you'll have to replace them along the way which will cost more money. And by changing them at home, you can leave them at home and put them back on during the summer if you want to finish using up the tread when you get back.
I'm not a fan of all season tires at all. They work OK, but not great on ice, with their small tread that's like sipping. But get that small tread in some snow, the small tread fills up with snow and is useless. To me all season tires are like trying to find a pair sandals that work in all seasons or a coat that's comfortable in all seasons. It's great marketing, but they don't really work well when you need them.
When we go out for a weekend of snowmachine riding, you don't always find a good plowed place to park and or it always seems to snow while you were out at a cabin. When you come back, the people you find stuck are the newbies with all season tires on that can't get traction to get out of the snow berm. They're fine for around town.
It's great that you have a 4X4, but you need to put decent tires on it with both more than 1/4" of tread and not an all season tread.
I have two sets of tires, five of each, all mounted on matching rims. They get changed from winter to summer tires depending on the snow and ice. When the winter tires are getting a little worn on the tread, I'll then run them a summer or two to finish using up the tread.
The Cooper Discoverer M&S tire, unstudded, is a popular tire up here for those that run them year around and don't change tires for the season.
Bill
