I agree with the idea of total battery isolation for three main reasons. 1- The security aspect - no one can muck about with it. 2- Should a cable rattle off you won't have a high current cable shorting out somewhere and 3- Should you have a front end bingle you again won't have high current wires shorting out.
I use the twist type isolator that sits in line with the main winch cable - but removing the cable is a cheap and simple option.
