If you really want to protect your boat, put it on trailer and install
one of these at front and back of boat trailer, tie trailer down to anchors and tie boat to trailer . . . assuming you are on high enough ground to be above storm surge of course! For additional margin, put chocks in front and back of tires, let some air out of tires, lower nose wheel on trailer, leave bilge plug out, and fill bilge with water until it runs out transom drain.