+1 for the Superfly. Really quick and easy to pitch. Easy to get taut and the side pullouts give you plenty of room.
Check out Shug's "Tarp Talk" video for a lot of great advice for pitching a winter tarp.
(Love my Warbonnet Edge, too, but not so much a winter tarp in country where "winter" means more than it usually does here in Arkansas.)
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