The only rideable portion would be the East loop to Lilley. It's on higher ground and dries up the quickest.
But, Crooked Vulture is a mess and riders should take the gravel path back to the parking lot to avoid the MUD.
Stay off of the South Loop, Buckshaver, West Loop, etc. I hear Lucky Dawg is okay, but most people at the demo won't know how to get there.
See you there,