Thanks for bumping this. It's a really creative idea and if my group gets together at all this month I know I'll be down a player or two, so this could make the perfect one-off while I put CoS on hold until our January session.
I saw someone else had mentioned a troll at a bridge to emphasize the "over the river and through the woods" part of the adventure. I'm stealing that too, only I'll have to make mine a touch demonic, give him a sack & some birch branches and call him Krampus.
Either way if the session ever comes to pass I'll let you know how it goes. It's a busy time of the years for everyone and with so much up in the air who knows if it'll even happen. Still, this is going in the vault for later use if it doesn't get used this year.