E, whenever I drop acid before hand.
JK (though I know someone who has done that, seems an utterly terrible idea to me) and I get sunburned way too easily anyway
I go minimalist. My phone, wallet. Pretty much it. Don't carry maps, don't need anything else.
I have never had zipped pockets. I was never concerned about it because never once has anything flown out. Until....Twister at Knoebels. Yup, Kingda Ka, Skyrush, Maverick, El Toro even Phoenix....all good, but for some reason that one did it.
So now I'm a bit nervous. Though do you feel zipped pockets are necessary? What about just using the buttoned pockets? Seems the same thing, and I can't imagine that getting undone.
BTW the next day, as I was about to go to the store for a new one, my home was called, by Knoebels. The phone somehow survived, a park employee found it, they thought to look at contacts, call home to tell me, and mailed it to me the next day. They don't joke about that small park mentality!