Taking Woodstock (2009)

The story of Elliot Tiber and his family, who inadvertently played a pivotal role in making the famed Woodstock Music and Arts Festival into the happening that it was. When Elliot hears that a neighboring town has pulled the permit on a hippie music festival, he calls the producers thinking he could drum up some much-needed business for his parents' run-down motel. Three weeks later, half a million people are on their way to his neighbor’s farm in White Lake, New York, and Elliot finds himself swept up in a generation-defining experience that would change his life–and American culture–forever.

Source: TMDb