On what basis are we assuming "Overweight" and "Out of CG?"
We know the pilot added about 1000 lbs (150 gallons) of fuel - but did that fill the tanks?
Do we know the actual passenger weights (including minors, but also winter clothing)? Do we know who was seated where (CG)? What was the non-human payload (guns + remaining ammo + game taken)?
Do we know the actual operating empty weight of this particular aircraft?