I have a tarago and I will have 1 in booster seat, 1 in baby seat and nb in rearward facing seat and I'm trying to work out where to put everyone as well. I think DD2 will go in the back so can sit with 2 of the older kids, DD3 can stay where she is behind driver and nb in the middle with other older kid next to her. That way the older child can make sure DD3 doesn't do anything to new DD4