As of the moment, Entrance Fee is P100/person, Day cottage rental is P1,000, Roundtrip boat fare is P150/person, minimum of 10 pax per trip. However, there is a different boat rate for those who are less than 10 - 1-4 pax is P1,000, 5-7 pax is P1,200 and 8-10 pax is P1,500. Terminal Fee is P20/person. Corkage Fee is P50/pax.
No corkage fee for outside food at the moment because their restaurant is not operational yet. I was told they will charge corkage fee starting January 2016.
You may also check the FB page of Cadiz City Tourism Office for pictures of the developments in the island.