The bands include such alternative rock purveyors as The Verve Pipe, Violent Femmes and Dishwalla, The Atomic Fireballs (a combination of music from the 40s and 50s, 60s soul, and 70s and 80s punk), and Grand Funk Railroad, which is a prime Geezer Rock band that's been together longer than most of the members of the other bands have probably been alive. That should cover a considerable range of tastes.
Getting into the event costs US$29.95 a person, though members of the VW Club can get in for US$24.95. For US$44.95, VW of America will give you a VW Club membership (which features special offers, discounts and the usual club stuff) and admission to DriversFest '99.