As I´m most of the time have to hook up my

all on my own I was thinking about the posibility to avoid getting out and in the car several times to check for the correct distance to the hook. When I read the advertisement for a very sheep Backing Camera System ( complete set 80,-€) I decided to install that. See the result
car about 10 ft away from hook
at this position
it looks about that
My conclusion: it helps very much in aligning the hook with the boat. However it is still hard to judge the correct distance.
As you might notice the boat is still in the winter layup

and the hitch of the trayler is way to high. May be it will be more easy to judge the distance if the hight is correct. Will try different camera/positions as well, the actual position is dangerous, will disturb the camera in case of misjudgment

.
Rainer