We are expecting #5 in November. I realize it is early, but I am worried about the vehicle situation. We will have 2 in booster seats 2 in convertible seats and then the pumpkin seat (ages when baby is born will be 6, 5, 3, and almost 2yrs). We currently drive a toyota sienna. I really want to get three accross the back. If not I guess we will need to find a way to purchase a Suburban. Can all of you with large famlilies give me some input on your vehicles and carseats? Thanks so much!