I live in a small town that has a terrible playschool so I am choosing to drive her the 15km into the next town for school, no busing or walking options. I ended up going into sears last night and bought a Radian car seat. With that I can use my regular size car seat and booster in the middle of the back row. It's still tricky to buckle the booster so I might just leave it buckled all the time and loosen and unloosen it by the shoulder strap. Then the middle seat has 2 bucket seats so it's a tight fit but will work. (I can squeeze between the bucket seats to get to the back)