I was at my first Burning Man, my first day there, and the temperature was 107. I was lying under my shade, misting myself and trying to convince myself this wasn't the disaster it seemed, when a cute 20-or-so woman walked up and said, "Pardon me, did you bring your garlic press? We forgot ours!"

"God in heaven," I thought first. "How can she be out in this heat?" My next thought was, "I don't have a garlic press at _home_. What th' heck is this place all about?"

So, yes -- get the corkscrew. It may be that you never need it, but you will be surprised how often someone will need to borrow yours. I always carry a corkscrew and my own cup at Burning Man. It's not just survival. It's civilized sheltering in place.