I don't think Omid will do it. The pills that were given to him are not enough to save him and have him running with you.
Also, I don't think Ben will do it (he is already dead for other players).
Kenny? He won't do it. His time is done, he will probably do something stupid or will get himself killed.
Christa? She will die too. She will stay behind with Omid, her new zombie lover.
In fact, it is highly probable that Clem will end up alone on that boat.