I am looking for the best rear view camera for when I tow equipment to small to see. Out of the side mirrors

Most times having a welder in the bed of the truck blocking the view out the rear window

I tied search but it was mainly about mounting locations .

I am looking for something durable to use all year round salty slop in winter and rain in summer.

I only need to know it is back there and if it starts to sway real bad.

Like I don`t have enough to do.

Thanks for any help.