I actually had the opportunity to visit LA in October. Our trip planned all around Knott's, USH and SFMM. I would stay away from Universal. While yes, the mazes are great, the waits are outrageously long. We waited 2 hours for Walking Dead until we gave up (and we were still far away from the entrance of the maze). We were at the park from 7 until midnight, we tackled the Halloween and Insidious mazes, rode Jurassic Park and the Mummy before we decided to leave, the park was getting unbearably overcrowded. We visited Six Flags Magic Mountain for the first time ever (and on a Saturday) The park was a pleasant surprise, there were a few great mazes (Red's Revenge, Aftermath and Willoughby's Mansion) the rest were just okay. Overall it was a fun day. Knott's Berry/Scary Farm however was unforgettable. If you are ever in LA from September-October, i would *HIGHLY* recommend visiting the park both day and night. The separate tickets (for KBF & Haunt), the waits for the mazes and the crowds are worth it. There's no other experience like it.