2 adults, 2 children traveling. Wouldn't I be better booking 2 separate itineraries (1 adult + 1 child) for the Family Plus option? It says "1x 20kg check-in bag, 1 large Check-in bag for your family trip." Cost is $42/per person. However, I read the 1x check-in benefit as per family. Booking 2 separate reservations would get me 2x check-in bags vs 1x if I book all 4 on the same itinerary?