How about 'gathering wood' for the huts or a boat(for the escape)?
I like the 'missing person who died', but don't forget about the ones who ran off and never came back!
Since they are by the ocean, why not 'sees a shark/jellyfish, etc.' then warns everyone to get out of the ocean? That would be hilarious to see them all "running away"!
I've always hoped that in my games, one of them would try to 'climb the wall' to see what was on the other side, I know y'all have, too!