You can fit three seats in the back of the the odyssey. I have it set up like that in my. I pull the door side middle row seat forward and the back flips forward. If the kids are able to then they go in and climb into their seat one at a time and when they are all seated, I climb in and fasten them all in and I'm not small by any means. It's not glamorous but not the end of the world by any means. It's doable and worth it if you've got to go out.