Gerardo Cruz-Manuel, of Guatemala, was visiting family when he was caught in a riptide.
The drill will involve sounds of gunfire to simulate where a gunman is shooting at people.
The summer concert series starts July 6 at Moonlight Beach.
Michael Vilkin, 62, is charged with first-degree murder in the March 28, 2013, death of 56-year-old John Upton, who gained fame for his crusade to rescue Romanian orphans