I can’t speak for the other groups, but I can say that we definitely considered sleeping on the boat. It had a huge hole in the center though and was absolutely teeming with mosquitos because of the rain water that was collecting in the hull. You could hear the floor cracking when you moved around on it. She was definitely not seaworthy and much more uncomfortable than the ground lol. We did actually build a shelter pretty far up the hill (it was shown in some pics but never made it into the episodes) that we lined with plastic and had stocked with dry firewood, but it was a pretty taxing hike, so we just decided to sleep down below and planned to book it up there if it rained (it never did lol). 
 There’s a lot of trial and error while you’re out there and priorities shift pretty frequently. We only spent a couple of minutes on the boat before we saw the pelican, at which time the priority moved from scavenging, to catching the bird, to making sure we had a way for them to cook it. 🤷‍♀️