To be quite honest, I do not major on carp simply because most of my days run from approximately eight a.m. to approximately five p.m. with a bit of leeway either side, of course. This means that the long stay, bivvy approach is right out.
However, I do get requests for carp and I do have a selection of lakes where big fish, almost completely unfished for, exist.
Over the years, my clients have landed a good number of fish over forty pounds with countless twenties and thirties, all achieved during office hours!