am i allowed to open my trunk and sit in there while watching a movie or no?

Yes

Yes in the back rows

There's an awning by the concession stand I'm sure if you park under there then they will allow you to pop your trunk and sit in there as long as you're not obstructing someone's view you need to get there early enough though to make sure that you can get under the awning

Like a van, SUV, or station wagon hatch? No. Definitely not in the front. You might be able to get away with it in the very back. If you're talking about regular car, I've never seen anybody do it. When In doubt as the crew there, always helpful.