Yes
Mask are recommended when NOT eat or drinking. They aren't doing seat buffers anymore (says they are on the site but they are not) so you'll have a stranger next to you, you may want to put your mask up.
I drank a soda, I'm sure you could bring your own if you wanted too.
Not sure. They have a bistro that serves alcohol. So, I assume you can bring your own if the bistro is closed.
Thanks! Your answer is awaiting moderation.