I stayed at Goolwa in South Australia for 10 days over Christmas and sailed the River Murray and Lower Murray lakes. The Caravan Park backs onto a creek, leading to the Murray. There are grassy banks, no rocks and happenned to be a star dropper in the bank. They are star shaped post, in case you Yankees don't call them that.
Anyway, removed the mirage drives but left it tied up and in the water for 10 days. I put a stainless cable through some hose then around the fron aka and locked that to the star dropper. Here is how the TI looked, and how inviting it was to go sailing.
There was a little scum on the hull and amas at the end of the ten days. It wiped off with a wet rag and mild detergent. Great stuff that polyethylene. They say there will only be polyethylene bins, hobies and cockcroaches left if there is a nuclear war.
From us downunder, forget the wars, enjoy your holiday and show us some pictures.