Do we need to bring lawn chairs. When I bought the tickets I thought they were assigned seats. Also if there's a thunderstorm what happens

They have seats that are not very great folding chairs. It might move to arena.

Not when I was there they had seating there. I know that they have moved some shows to the pinnacle but not sure if that is a policy

You can't bring amy chairs, seats are provided. They will play until basically the storm is right overhead and poses a threat to safety.

You aren't allowed to. At least we weren't. It started storming during Hank jr a couple weeks ago just made some cool pictures he didn't miss a beat just kept playing