Pie Pumpkins make the perfect accessory for this module. The game tends to run a little short, so giving everyone some markers and pumpkins to "carve" out designs during the festival can really get the PCs involved in feeling the festivities, plus they make excellent accessories during the game when your narrating the fight scene with the Beheaded; They can be used as props by the players, especially the hand-to-hand PCs.
Bonus points if you bring pie for players during the Venture Captain introduction.