We used our plugs by themselves. Would actually run them 30-50 ft below the surface first thing in the morning...crack of dawn. Nothing quite like a spring salmon exploding out of the water just behind the boat. They are pumped right up at that depth, scappy, and tons of fun.
Then we would drop the plugs further down as it continued to get light. But I only use single barbless hooks!! Always seemed to work well enough and we caught lots of springs.