Ursack for me too.
I don't use the liner, but I use lots of zip lock bags and (usually) a couple of cloth stuff sacks. Garbage goes in a zip lock bag, sometimes doubled, depending on how liquidy the garbage is.
ETA: "cooking" at night, but headlamp would be a pain, but I've boiled water or made noodle dishes plenty of times in the dark. I have a self-ignighting stove - that helps! I don't need to see where the fuel is being poured or where to stick the lighter. I just click the button.