Agreed. I love AK at night, and it's rarely dark, at least outside of winter months (when I rarely travel).
Two weeks ago I purposefully did the "hop in line at Flight of Passage right before close" in part to avoid paying for the LL, but also because I figured it'd be dark by the time I got off. Worked out perfectly. It was dusk when we got in line, but dark by the time we got off. We were able to walk through Pandora and back out of the park with very low crowds and the evening lights.