Yes, the reason you probably haven't encountered a ray in the Mirador is that has so much rock and reef. Stingrays like a sandy bottom where they can flip sand over themselves and camouflage themselves for hunting.
Stepped on one in Las Conchas about 20 years ago. Had no idea how to treat it. A family staying at one of the houses next to ours came running down with a bag of ice. I kept ice on it for about 20 minutes until the pain was so excruciating that I had to go to the Red Cross. Those people, I found out, gave me the worst treatment I could have gotten for that wound. I needed the hottest water I could stand, and they gave me ice!
Most people will tell you, even those who have had terrible injuries in their life, that a stingray sting is one of the most painful experiences they have ever been through. I, from experience, completely agree.
Shuffle, shuffle, and then shuffle some more.