camstone can't make it due to a bug.
To fill in for him, pholph has invited Sirfox, a local dude whom I've met but don't really know (but who seems cool enough), who will take the duties of running camstone's ranger Jaer for the evening. (The out being, if he has Jaer do something wildly out of character, or gets the character killed, we'll retcon it to something different next time).
And it is, of course, pholph's farewell session.
On top of all of which, tonight's session has the chance of throwing the characters into some mighty bad mojo, depending on how it goes. There is an encounter in the adventure which, should the players slip up or the dice be unkind, could go really, really badly. (I mean, really, who expects something good to happen when people are going around asking "Have you seen The Yellow Sign?")
Cross your fingers, brothers and sisters, that the campaign survives this session! 0.o