I would also get a minivan.
A little tip for accessing the back... keep one of the bucket seats flipped down flat so you can easily get the kids in/out of their carseats. (Our last minivan even had cupholders on the back of the center seats, so you could use it as a table for snacks/drinks.) At home, we often just leave the extra seat in the garage. It's tough to squeeze between the two center seats, especially with a little one.