Well the thread drifted a fair bit as they do but just to try to keep it alive a bit longer - it had nothing really to do with the Fire Season (other than that's when the smoke is really bad) and absolutely nothing to do with fire fighting or other ancillary fire operations at night and nothing at all to do with NVG operations. So far as I'm aware, they can only be done in VMC anyway.
I'm no further ahead as to whether it's OK to go at night when there's a mention of smoke on the Area Forecast as originally described?
ORH