When I was in junior high school, I read a story about a man who visited a travel agency and was shown pictures of what looked like an alien paradise. He had to go out in the woods and wait in a barn with a bunch of other vacationers, and he finally decided he'd been ripped off and left the barn right before it transported everyone else to the alien world. He went back to the agency and they refunded his money but wouldn't let him try again. Ring a bell with anyone?
Also, there was another story that I don't even remember the plot of, I just remember that one of the characters stepped into an airlock and smiled and then blew up, except the person witnessing it may have been hallucinating the whole thing. I know that's not much to go on, but that's all I remember.