Note: The artwork was found online, and was not my creation. This is a fan creation and not meant to challenge the copyright of the artist, but I'll be happy to remove it.
The adventure was entitled, "Night of a Thousand Pumpkins." The gang from Mystery, Inc. has been invited to a relaxing Halloween weekend Shaggy's great aunt, who runs a bed & breakfast in Darke's Hollow, Connecticut. But something ominous is stalking the night, and the silent town is filled with eerie jack-o'-lanterns...
NIGHT OF A THOUSAND PUMPKINS
(full adventure without pregens)