The Rev. Samuel Samaniego and his wife, Rosa, met up with dozens of members of their church — Iglesia Bautista Cristo La Roca — bright and early at Laurel Park on Tuesday. By 7 a.m., Samaniego said he and his congregation had staked out a corner where they had plenty of room to put up a volleyball net. He said the location was ideal because it was next to an open space overlooking Lake Lanier, where many of the church’s youths could also play soccer.