X Day 5 occurred July 5th 1998 (2003) at Brushwood Folklore Center near Sherman, New York.
It was unique in that it featured #subgenius Camp in Alt.slack Woods using physical paper used to "log" the conversation of the attendees.
Draft pages of The Subgenius Psychlopaedia of Slack: The Bobliographon were posted around the camp grounds (particularly in bathroom stalls) before it's later publication.