The boat: From where to where?
Where was Joe's boat tied up when he put Danny's body in it. We didn't see any boats near the discovery site, so exactly how far did he carry Danny's body? Where is the nearest dock? Must be quite a way from the hut.
And then he brought the body to the foot of the cliff so people would think Danny jumped? Seems like he should have sunk the body so no one could find it.