Yes. I didnt know either when i first went but many people did it.
Yes, you can bring chairs, air bed. Your pets. I saw a family with a truck being in a projector so the kids could play ps4 before the movie. Lol. Also we bring air beds pillows and blankets in case it gets cold. If I were you guys I would bring a charged block rocker,so that your car battery doesn't die.( I have seen that happen. )
Yes you can
Yep always bring mines for the back of my pick up
Yes
Yes it or encouraged I was so cramped from sitting in the car so long.....but it was fun
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