any chance you could get little bub to sleep and lay in basket or even on a blanket, maybe with a hat/lights/tinsel? Basket is probably a little safer for stopping older kidlet from trampling i guess lol

is there some sort of "encouragement" you can use with older DD to get her be a bit more compliant?? My DD was about that age for her second christmas photos, and a combination of people and a small bribe of a chocolate freckle helped heaps!