For several weeks Phish has dedicated its Web site to teasing fans about the location of its three-day Halloween festival, at last craftily revealing its venue to be the Empire Polo Fields in Indio, Calif. The three-day festival, the first of that length in Phish history, has been dubbed Festival 8 and will run Oct. 30 – Nov. 1 on the same grounds where the Coachella and Stagecoach festivals occur each year.