Yes dry weight is typically "no fuels, oils, water, extras like clothes, chairs, bbq, coolers etc..
I have always worked off 6,450 lbs as the from the factory brand new dry weight. Then add the fuel, oil, and water weights plus 500 lb for all the little stuff that gets squirreled away. Don't forget the trailer weight (approx. 1,000 lb/ 450 kg) if shipping on the trailer.