Step one - Keep current copy of nautical almanac
Step two - Keep current copies of Cook Island and Marquesses Island groups charts.
Step three - Keep passport and visas current
Step four - know where to find a good sailboat, about 35 to 45 (cutter rigged) with fresh water maker on board - within a 2 hour drive.
Step 5 - Mix. Add some long term storage provisions and you get to see how good the reef fishing is this time of year.
Got your zombie plan?
I'm working overseas. Not a whole lot I can do right now.