To be fair, I can drive anything that's allowed on the road and although I have been using cameras for a few year on the big stuff, I've never really needed them on carts - until recently.
A lot of modern cars have narrow rear windows & high rear ends, often with lots of overhang on the bumper - although this still isn't a problem (once you learn to judge the distance) the parking camera gives you much more manouvrability.
I also own a dobbin & found reversing quite easy with the big mirrors etc BUT, with the addition of a towbar ...
Having a camera hidden just above my numberplate allows me to reverse into a space & get within a fraction of an inch from the car behind - the sensors are fine down to 12".
As I keep reminding the OH, that extra 11" can make all the difference.
Added to this, it is sooooo funny to watch the look on their faces as they see you reversing towards their car - and you don't look as though you will be stopping:devil:
https://www.fiatforum.com/doblo/138300-reverse-park-sensors.html
My take & picture in the Doblo thread.