Go ahead and start laughing now, cuz this will seem like a real low rent answer to your question. I've donated as many anchors as the next guy, and have the best luck with 2 medium size mushroom anchors on a big clip on 75' of 5/16" nylon braided rope. I call the clip a "quick clip" and it looks like something used in climbing, like tree cutting or rock climbing. Small ones are used for keys. If it's too windy for them to hold, I go home.