Fill it with water, and put it beside sonething bigger than the boat. Mine goes next to the hedge at my back fence, and it survived Katrina and Rita like that. It's low to the ground, it has something (hedge) to catch/ break the broadside winds, and, being filled with water, it is hevy as all Hadies.
If the water goes out after the storm (it happened in New Orleans), you have a supply to flush toilets, wash down items from outside, etc.

Hope this helps,

.....CLIFF
(Like, who else?)