As a local, frequent visitor, a few thoughts on this:
1. Curious what level of school calendar research you’re doing. Are you looking locally (Orange County and LA County), Southern California, all of California, neighboring states, the entire country? Just curious because locally we don’t even have a fall break in my school district, but I know it’s common elsewhere.
2. School breaks seem to matter less than they used to. When my son was 2, 3, 4 years old in 2017-2019, we would visit on weekday mornings when school was in session and the parks were frequently pretty dead, especially midweek. Fast forward to post covid and the parks are basically always crowded, no matter if it’s a weekday or weekend (weekends are often less crowded than weekdays!). I see loads of school-aged kids in the parks ALL THE TIME when school is in session. I think post-covid, more people are home-schooling and making their own scheduled, and others have no qualms about pulling their kids out of school to go to Disney. Hence, it’s been crazy crowded most of this year … but summer was looking so slow that Disney decided to pull out the old California resident ticket offer again.
3. The week leading up to Halloween will be insane. There is no chance it will be slower than the rest of the month. People want to celebrate and get their Halloween fix before it all goes away 11/1.