Positions might have been a better word than officers. So, the 'position' of cook, the post of Doctor, and so forth. All of us are pirates, but pirates and something else...
Pirate and cook.
Pirate and carpenter.
Pirate and cartographer.
An aid to some small order, but more than this, a distribution of preparation. If someone plays the ship's carpenter, or just one of many ship's carpenters, they could study all of the material necessary to educate the rest of us and the public. A carpenter could collect the period kit of tools to use there at the festival. They could also run the manning of the pitch pots (which Harry has agreed to let us have at camp if we can find pitch and pots).
A ship's Doctor could also prepare a necessary kit. Capital knives, cauteries, forceps, tenaculums, bullet probes, saws, catlins and so forth. Then after the twice daily battles with the fort we would have a surgeon to bear our dead to.