Believe it or not, the standard crew is 20... with no passengers. In our case, they'll have the minimum crew (10 people) as well as a Master, a Journeyman, and two 'Prentices from the Guild of Navigators, and the Party.

Of course, people didn't have much of a sense of "space" back them.

The journey will take almost a month to travel all the way from Seagate to Bliss, with the aid of magical winds. You've easily got enough room for three months worth of provisions (especially if they're conserved) -- but the ship only has space for about a month and a half of fresh water for 20 people (and that's only if it is used sparingly! No freshwater baths!).