Reversing cameras

Lasher

Hello fellow campers,

I have a Swift Conqueror 630 which I tow with a Landrover Discovery, my wife and I rally alot with our local centre and quite often I will take half day off work collect the van, take it to the site and pick the wife up later, to make hitching up easier
I have been looking at reversing cameras which fit in one of the number plates lights and show the images on my satnav.

I was wondering if anyone out there has any experiences using these devices and whether they give a good enough view of the tow ball in relation to the caravan to make it idea for a single person hitching up.

Many thanks  Lasher