Nothing more irritating than someone running a generator in a rustic camp, even in the day time, except maybe for loud music. I personally think if you can't do without the electricity, then go camp in a modern sight.
If you're out by yourself then fine, but if you're going to a rustic campground where there are other campers, please consider that many who camp in the rustic areas are there to stay away from all the noise.
Even 59dB is annoyingly loud when you're trying to hear the birds and the wind in the trees.
I camp in tents and get light from flashlights and campfires, if needed, I fire up the coleman lantern, but even that is rare. Thats what rustic camping is. It really bugs me when somebody pulls up in the next lot with a big camper and proceeds to run their generator all day.