Hmmm, I'm not that sure. I mean everyone is covering their own food, bring like a towel or a blanket if you can, because I don't know how many we can bring (my boyfriend and I need to be warm that night D:), we'll probably bring one of them sun umbrellas because we can, I can't really think of anything else. Just bring costumes and attacks for battling each other or something.
Also, official time is 11.