Based on this information, what we can conclude about what Joey told Jessica and Felicia about the cabin is:
Joey told them something horrifying.
Explanation:
In general, what makes us afraid of falling asleep is something horrifying. For most people, horror movies or stories will do the trick, especially if they think they will dream about whatever it is they saw or that was described. This seems to be the case with the cabin Joey described. He probably talked of an abandoned cabin in the woods, where creaking noises can be heard and where hikers claim to have seen a ghost or monster of some kind. No wonder Felicia would push it to the back of her mind. Such a description would certainly make her afraid, maybe even make its way into her dreams.
