Rhiannon Guevin and Roger Schmidt with the Sitka Fine Arts Camp share details about this Saturday’s performance event “Sing, Sing, Sing” (7 p.m. Saturday, January 13, Sitka Performing Arts Center, advance tickets available online). Camp alumni who have gone on to careers in music will return to celebrate 50 years of the camp’s history in opera, art song, jazz standards, musical theater, and pop are all in the group’s repertoire. The show will close with a full-company performance of “One Day More” from Les Misérables.