Another thumbs up for whips. In 2008 we had a tornado rip right right across our point either uprooting or snapping almost all the trees. BIG TREES! One whip base was pulled out of the dock (held in place by three good-sized lag bolts) but otherwise the whips were undamaged and neither was the boat.
I got mine from Overton's too (Dockmate brand). One piece of advice: don't go with the 8-footers unless you have a small boat. You really need the 12-footers to get the necessary clearance from the dock and handle the weight of a larger boat.
Overton's Dockmate mooring whip page is
here.