They sell snow anchors for tents that you can also fill with rocks, although I doubt even that will work for any serious winds. We always leave our tent wide open when we leave camp set up at TC, with as little on the ground as possible. Last time, we left our sleeping pads (not bags, just the pads) on the floor of the tent, and we couldn't believe the number of dusty little marmot footprints that were all over them when we returned. There was zero food in the tent.
