Under Sellswords we get the snippet
"Their kindness diminishes with their winter food stores, and you’ve been sent off into the snow one too many times."
Part of the adventure could be the party trying to find a place to host them for the winter. Being turned away or turned out mid-winter might be an inciting incident. I could also see a minigame around problems happening during the winter that might force the players out. And of course there it the Winter that never ends idea (shameless plug ;))