How about using a plugin like Keyper, ShotAnvil, or the built-in Scene Removal Mask effect to cut the people out of the shot? First, copy the clip, so one’s on top of the other, then add one of the 3 keyer FX to the top clip, and on the bottom clip, use shape masks to isolate the band and color correct it. If the camera moves, track the background so your shape mask follows. Just a thought.