Flew mine in the dark for the first time not that long ago. It was pretty much a non-event. If you have EFIS screens make sure they go dim enough and you know how to dim them.
My panel is full of analog instruments except for my portable gps. With a red light on the roll bar behind my head (tip-up) I had no illumination problems. I was expecting poor performance from the little 55watt duckworks lights, but found it adequate on landing.
Really only one minor annoyance on the whole flight that was entirely my own fault, I chose to fly my airplane in the dark for the first time on the 4th of July.
There just had to be one person launching fireworks off the approach end of the runway. I shouldn't have been surprised and I don't "think" a firework could really cause a major problem, but it sure felt like I was being shot at when a big starburst thing exploded underneath me at 500feet on approach with no warning.
Otherwise, the plane landed same as it does in the daylight. In hindsight, I think practicing a few landings in the dark at a larger, more well-lit runway would have been a good idea.
Hope that helps!