I guess I would just encourage them to really take advantage of the time they have in isolation from their normal daily routine.  I would encourage them to rarely use the internet take it as a time to really listen to what God might be trying to say to them when the distractions are down.  I would also encourage them to try to really branch out to people they would not usually hang out with.  Not to get too comfortable only hanging out with a few people but to really spend quality time with everyone.  And lastly I would really encourage them to just pray over the relationships they have with other members of the boat.  If they have a problem with someone else to just bring the problem before God and listening to how he wants that person to address it.  Nate.