We have stayed at El Cozumeleno before and dived with their onsite dive op, ScubaDu (Antonio, do you run that dive shop? Your avatar sure looks like the Antonio we met there...) Anyway, they did a bang-up job of carting our gear down the pier to and from the boat, and rinsing and storing it nightly. The man who took care of the gear (Carlos? has been a few years) worked really hard for us, he was great!