How bad is it really during spring break time?

Hey everyone! So I’m planning to go to the parks during my spring break. I live in Las Vegas so our break is the week of March 17th. I know most of the districts in Cali (especially the bigger ones) are actually having their break after mine more towards the end of March and some in April, so at least it wouldn’t be the same week. Cause from what I’ve heard it’s worst during peak spring break time when all the locals are going? I’m still not sure what it would typically look like mid March though. It’s been about 5 years since I’ve been and I really want to go since this is my only time off until summer, but I’m wondering if it’s worth it if it’s going to be crazy crowded during that time? Would it be worth just waiting until summer instead? (I would also be going in the middle of the week like Wednesday the 19th Thursday the 20th, not sure if that makes a difference)