Traffic will be a little lighter. Expect to take 10-12 minutes off a one hour commute. As a pp mentioned, UH and most private schools are still in sessions. Public schools here serve their geographical region, so public school alleviate local traffic at best. However, lots of parents take the week off to travel or care for their kids, and that does help to alleviate traffic.
I’ve never been to Aulani during fall break, but I know a lot of families that have. It’s supposedly packed with locals. I would suggest swapping activities with the prior week. I’m not sure what activities you have planned, but I doubt most tourist attractions such as PCC and Kualoa don’t see a huge uptick in attendance during fall break.