Depends on the water depth, structure and wind strength. Shallow bare bottoms call for a short heavy dragging chain. Deep water or a lot of submerged structure calls for a sock. If I can use a chain (and I usually can), that's my preference. Controlling Scope (depth X line length) gives you precise speed control, which is more difficult with a sock if the wind is strong enough. Hook that chain line to an electric anchor winch and you've got convenience also. Just bump a switch one way or the other to control Scope.