Oh, one other thing: The next time I go on a multi-day snorkeling vacation, I'll be bringing about a pint of pure, organic aloe vera gel. The NOW brand sells for about $5/qt on the net. I cannot vouch for any actual medicinal qualities the stuff may have but it does feel good on the skin after a long day of sunshine. And speaking of sunshine, when I was on the snorkeling boats during my last Keys trip, it seemed like almost no one was worrying themselves about the sun. To my mind, this fits into the category of "Not taking care of oneself." For my part, I wore a wide brim hat, t-shirt, put the towel over my knees, and kept the sunblock fresh. If that all sounds dorkish in the extreme, all I can say is that I sat there in the tropical sun having a long conversation with a pediatrician who had none of the above stuff, nor even sunglasses. He looked like a cooked lobster. Dork I was not.