As others have said, it's instrument flight as soon as you get away from the city. Offshore, it's full-time instruments for sure. One other thing I would suggest is to do everything slowly. Make your approach very slowly, so that it seems to take forever. Engine failure is far from the most likely thing to kill you, so don't worry about that; keep your approaches slow, and I like a slightly steeper-than-normal approach, so I don't hit anything while dragging along. You're much more likely to hit obstacles at night, both during the approach and in or near the landing area. Stuff can be sticking up without your ever seeing it.
The leans is an interesting phenomenon. I experience it fairly often, especially at night. Get a line of lights at an angle, and it can seem like you're turning, or banking, and it can be difficult to overcome. At my home base, there is a causeway that angles across the localizer and is brightly lit. If I fly the ILS at night, getting glimpses of the ground, or with the lights shining up through thin fog, I get the leans almost every time from the lights. Here the S76, with its limited downward visibility, is a boon, not a drawback.
Flying at night without an instrument rating, at the very least, is courting death.