That helps. Plus as we're only on the boat in warm weather, clothing and gear is pretty easy(compared to a family of 4 going skiing for a day or a week-there's a load!).
Mostly the bulk(tons over the years) is and has been provisions. Often we bring provisions...back up the ramp at the end of a cruise. But it's a tough call not bringing 'too much' for even a family of four. Weather can stick you somewhere for extra days or friends show up and suddenly you've got company(and that's a party on the water).
And we're the worst for going with a mind set that a weekend or week is a celebration, and that includes, feasting.