The only enclosed seats are the luxury suites that the groups can rent. they start at $600 to $700 for 24 people depending on the day of the week you go. These are only sold to groups and in advance from the box office.
There is seating that is covered if you want to be out of the sun or rain.
Not that I am aware of.
There are covered areas but enclosed seating areas that I am aware of.
It’s a great field.
i am assuming "inside" meaning Box seats, yes they do.
And they offer catering packages.
Get quick answers from Fluor Field at the WestEnd staff and past visitors.