Tim Anderson came to Ephemerisle last year. He was very helpful in setting anchors, and providing organizational help. Turns out he's also written a lot of cool instructables (over 200) for making improvised tools, including many that are useful on the water. Check out his website:
http://www.mit.edu/people/robot/zp/zeroprestige.html
http://www.mit.edu/people/robot/zp/zeroprestige.html