zip locs, bug spray (just in case), advil, waterproof bandaids (hubby got blisters from his fins after 6 dives in 3 daays!). pepto bismol or immodium, again, just in case. the stuff there is $$$.
i stayed there last year, you will enjoy yourself. the staff are great. if the have paella one night, get it! eat at rendezvouz next door one night, order the lobster thai style. mmmmm.