Okay. I'll give some more info...if you insist.
They are starting at the freshly ruined port city of Landsgate. It is the only "civilized" city on the continent of Tamerland. The rest of the area is dense jungle, inhabited by dinosaurs, lizardfolk, and the occasional doppleganger, who head there to be worshipped by the lizardfolk (they do that...I dunno.)
The stopping point is a small nation known as The Dreaming Isles. It is inhabited 99% by a sub-race of humans called Salt Bloods. They are sea faring folk, and a lot of their racial abilites have to do with sailing and drinking. They're sailors, through and through. One of the party's "clerics" is a Salt Blood, and is heading home to inform his people that a prominent member of their people, the Mayor of Landsgate, has been killed by the Yuan-ti slavers the party just kicked off the Tamerland.
Landsgate was demolished by the slavers in a massive blast, which admixtured psionics and polymorph magics to turn the inhabitants of the city into disfigured snake creatures. Many of them fled into the forest, but the few that stayed agreed to help man a vessel to get the party home. The afore mentioned Salt Blood "cleric" will end up being the captain, since he's the only one who knows about sailing.

So, the players will have to be in control, otherwise the ship won't go.