The Dave Matthews Band has invited a number of artists to join its Summer Getaway to Randalls Island from July 30-31. The Barenaked Ladies, the Black Eyed Peas and Robert Randolph and the Family Band will share Main Stage duties with Matthews and company, with Randolph scheduled to kick off the day long festivities both afternoons. Ray Lamontagne, Jem and Mike Doughty will perform two shows a piece the festival s side stage. Fans can get down to Dave Matthews Bands newest disc, Stand Up, on May 10.