Once upon a time, I camped out to watch basketball games at Cameron. (Reminds me: Big Duke game tonight against Ohio State. Obstacle: Team Umizoomi on Nick Junior, popular with other members of our household. Hmm.) But I've never heard of this: camping out for a spot in a magnet school.
Read this: fascinating blog by Elisa Hoffman.
Here's an article about it, on Cincinnati.com