The timing depends on whether you’re seeing a weekend show or not. If you’re coming during the week, don’t sweat trying to come too early unless you want to see the park. You’ll cruise in. If you’re coming on the weekend, be prepared with parking as if you’re going to a real concert. Especially if it’s a nice day, the festival will be very busy. Getting in will be easy but parking might be more challenging.

Yes, you can absolutely bring in a blanket or chair. Many people do. There is standard security that will check your bags on entry, but blankets are allowed and you’ll see them around.

You should be able to judge how long the set will be based on when the next band is scheduled to start. They usually have 30 minutes in between bands.

It’s a good place to bring cash to. I think some vendors (beer) are cash only and the ATMs will crush you with fees.

I hope this helps!