Do all concerts require a parking pass

You don't have to park on the Pavilion grounds and you don't need a parking pass.

Yes. Must pay at least $10 to park.

Yes unless you park outside the venue and walk in.

I recommend pre buying as some of the lots fill up and its cheaper online

You can get a pass when arrive, they offer multiple options and give you a hang tag based on that, it is cheaper to pre- buy online