I don't have panel pulls on any of my tarps, but I always carry a couple of grip clips in my pack. I can add panel pulls, extra tieouts, or all kinds of other useful stuff, at a moment's notice.
Here are some pictures of a day where I got caught with 20+mph winds hitting the broad side of my Big Mambajamba tarp, and used a grip clip to give myself some more room inside.
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