I won't go into mission specifics, but I can tell you that you don't fly every day. Typically 2-3 times a week, 5-6 times during busy periods. Flights range between 1-3 hrs, depending on the type. Schedules can be very inconsistant - in other words, one day you're working 8-4, next day, 6pm til 2am, so it can play with your internal rythms a bit (and sleeping patterns). It also makes things difficult, because quite often you are flying at the END of your work day, when you're the most tired - because typically a day is planned around your "crew day" - which is the allowable time, by regulations, that you are allowed to fly/work in a given day. A lot of times, you are working to the maximum allowable time, with mission planning taking up the majority, and then executing that plan at the very end, down to the minute that you are no longer legally allowed to fly.
Working with your customer involves actually flying them around, as well as liasion for mission planning. How often that happens depends on your customer, as well as your training requirements. Flying helos is very, very hands on. While there is an autopilot on the Griffon, the only time it is used is during long transits or IFR. The remainder is all hands and feet, day and night (on night vision goggles)