Mine is always on when driving, I can watch the towed and tow bar for anything unusual, and I don't have to wonder if I'm allowing enough clearance to change lanes in heavy traffic.
I have a wireless system so I converted the old camera coax to a pos and neutral wire-set. Center was pos, braided shield was neutral; works great.
2000 Winnebago Ultimate Freedom USQ40JD
, ISC 8.3 Cummins 350, Spartan MM Chassis. USA 1SG, retired;PPA,Good Sam Life member."We the people are the rightful masters of both the Congress and the Courts - not to overthrow the Constitution but to overthrow men who pervert the Constitution. "Abraham Lincoln"