I have a Sailfish 282 which is equipped with a windlass, which is great and makes dropping anchor a breeze. But when I drop next to a sandbar, the boat often blows all over the place. So looking to add a simple stern anchor to keep the boat in one place. Primary anchor will still be the bow anchor. West Marine has an anchor package that comes wit an 8lb danforth anchor, 4 ft of chain and 150 ft of 3/8 in rope. Any idea if this is sufficent (big enough) to keep the boat from getting blown around? Thanks!