Props and items needed at game:

Flippy (starts with me; give to Kelly)
Oscar Mayer Wiener whistle (in Jeannie Whited's envelope).
Mildly Poisoned Port Bottle (Bob Enfield)
Very Poisoned Port Bottle (Charles Sumner)
Drugged Port Bottle (Dig Freedman)
Shotglass for opening ceremonies (in Jeff's pocket)
Shipping bill for port bottle (in Jeff's pocket)
Jeff Diewald Dead Body card
Music:  REM's It's the End of the World as we Know It.  Elvis' Greatest Hits.  One or two G&S disks.
Five belief-prisms, in the hands of various members of the Toastbusters.
The note telling Ryan to stay away, or he'll never see the spatula again...
Copies of Charley's death threat, with all Con-chairs (Jonathan, Randi, Stephanie, etc).  One on Jeff's body.
P-5 propaganda flyers, probably a couple hundred:
  Death to Those Who Oppress the Masses With Pitiful Poetry!
  Free the Iambic Pentameters!
  etc.
Copies of Jeff's poems, in the hands of the P-5:
  Jolly Nosferatu
  Berlin
  Black Ice Life
  Night Sky
  Ode to a Suicidal Cow
  Words
  Any others?
Three one-shot Dimenional Disruptors, in the hands of members of Those in Black.  These are capable of shutting down a Vortex prematurely.  However, unknown to TiB, they don't actually cause the force to go away; it simply shunts it elsewhere.  If used on the Saturday Vortex, they will have little effect save to reset the Vortex back to its beginning again.  In fact, only belief that the Vortex is closed can close it, the TiB don't know that.
One-shot flamethrower for Tim Lasko.
Little "Hello, my name is" badges -- about 500.