Snorkeling

We will be taking the water taxis to Ixtapa Island to snorkel one morning- understand from this site that our "target" is Playa Coral. Suggestions for where to "set up shop" for our time there re: food/drinks/equipment? Assume kid size equipment is readily available as well as life jackets for all? (My experience is that is "easier" to enjoy the snorkeling expereince w/ the extra floatation ...) What time to the water taxis start running in the morning? Thank you kindly.