The Halloween decorations, treats, music, etc., make October a fun time to visit. Yes, it is crowded and expensive, but worth it to me. Before your trip learn how to use mobile ordering for meals/snacks, and learn how to use/maximize Genie+ (YouTube is your friend). Especially if you are a Star Wars fan, download the Disney Play app and do some of the Data Pad activities (a great way to have hours of fun without standing in lines). Single Rider line for Smugglers Run was a walk-on every time (you’ll likely be an engineer, but always a fun ride). Single rider is the only way I’ve ever rode Radiator Springs (at DCA), and Splash Mountain has an unmarked single rider option - just walk up the exit path.