Anyone remember the title/writer of a fic based on (or paying homage to) Ray Bradbury's Something Wicked This Way Comes - ? Evil carnival comes to town at Halloween, investigated by two young boys (pretty sure it was Sam and Dean, although not sure whether it was Gen or S/D).

That is literally all I can remember about it. But I have faith in this community's collective omniscience! Please - and thank you!

P.S. I know it was not Sylvanwitch's excellent All the Dreaded Cards Foretell.