>>1247058if you're so set on making your own then your own on site then you'll need bamboo, 300ft-1000ft of paracord, and a machete. And probably your own paddle.
>collect fifteen 12ft+ long bamboo stalks>line nine of them up and attach them with the rope>create a lifted storage area with 4ft long cuts of bamboo stacked 2 more layers high>create anchor point on ship with remaining rope>attach to tree on land when not in use 