Any of the variations on the trucker's hitch or taut-line/midshipman's hitch mentioned in this thread can probably be made to work. Or maybe even just a clove h

Any of the variations on the trucker's hitch or taut-line/midshipman's hitch mentioned in this thread can probably be made to work. Or maybe even just a clove hitch secured with a shoe knot or whatever else you're using now might hold together long enough to stay tight. I've used a constrictor knot for similar jobs before, but it's honestly not great; having space between the poles/cords under the knot turns it from extremely difficult to untie into somewhat insecure.