When shooting families, I go big or go home. You need that long focal length to provide separation between your clients and the background. I try to shoot 85mm or higher for beautiful, classic family portraits.
85mm 1/1000 f2.2. ISO 320
85mm 1/800 f2.2. ISO 320
70-200mm, zoomed in to 200mm 1/320 f2.8 ISO500
70-200mm 1/500 f2.8 ISO500 - you can shoot wide open as long as all the subjects are on the same plain of focus.
El servo focus, tracking with moving subjects to keep them sharp. 70-200 1/320 f3.2 ISO500
70-200 1/400 f2.8 ISO500
70-200mm 1/500 f3.5 ISO160
Have any questions? Looking for a more fashion inspired look?