I'm currently gming "The Night Sow", we already had 6 hours of game, and the first step of both countdowns is done.
My thoughts on the scenario: you'll need to create some fishermen as NPCs. Also, it would be nice to have their wives or mothers or grandmothers telling tales about the various legends of the local lore. For example, since there is a tavern in the script (Nils Corfitzon's tavern), it's nice if the villagers there can give the impression of a superstitious town.
Also, it's tricky to handle the players and prevent them to rush into the frozen night... so be careful when describing the area, the sharp rocks, the snow covering everything. It creates a sense of danger. One of my players exclaimed: "I don't know about you but I sure am not going!"
It's a really nice scenario, you only have to be careful with the monster. It really can kill players if you don't pay attention. (I'm playing campaign mode, so I don't want them to die... XD)
Has anyone else tried it yet?