There is no visibility out of the rear of the van without the backup camera.
To date, we've had no major mechanical issues with our 12 passenger Ford transit. It seats our family of 10 comfortably, including 3 car seats, with plenty of storage space in the back cargo area. The cargo area easily fits a double stroller and single stroller with room for other items as well. We sometimes struggle adding phone to and using the link system. I find the backup camera to be very easy to use and accurate with ample lighting when reversing in the dark. I do wish that there were more latch accommodating seats. Also, we find that we often have to run the ac even when it is not hot outside because there is no natural air circulation in the rear of the van.