The Capt has paddled our skiff to the beach and is walking the beach to see if there is anything else that could be useful. That list of useful objects includes empty 5 gal buckets and 3" line. The line is in good condition but the question is whether it is long enough (30+ ft minimum).

The board will be cut down to the size we need and we'll dump the excess ashore when we dump our garbage.
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QMC, USCG (Ret)
The best luck is what you make yourself!