May I assume then the plan then is to keep those affected in the ship during the full moon?
Fortunately no. I had... a near experience in my youth and it led to a good deal of research regarding the condition, defence against it, and recognizing it - that sort of thing. Lupin is the sort of person who is unlikely to purposefully harm anyone when he is in human form, but the wolf form is very different. It is not to be taken lightly - as I gather has been discovered here.
I lack any of my potions materials so the primary tool we use to combat it at home is likely not at our disposal, but I have my wand, and a good understanding of magic that serves as a defence to the dark arts. But I can speak with Snow on that matter.
I don't intend this badly, understand, but how certain are you that these grounder werewolves are entirely eradicated?