[X]Suggest spending a day camping together. And..
-[X] Ask him to tell you what happened after you left.
-[X] What happened to the Waitress that you left him with? Did they run into the creature?
-[X] Did he maintain contact with her? You want to reach her as well, to help stay away from the wrong sorts..
-[X] If he'd like you can put him in contact with others who can help him make sense of his first experience with the occult - mention the Professor and Jackson. The Reverand as well, how he took in a troubled man recently.