cottontail, There is most definitely plenty of shade by gorgeous palm trees and umbrellas. I'm not quite sure why they are so popular. We had a complimentary cabana last year which we didn't even use. If you are on the club level, which we were, they provide sodas and waters all day anyway, although you do have to walk up to the 7th floor to get them. Or there is a great poolside restaurant and waiters who will bring you drinks.
We wanted to be closer to the water so we just got lounge chairs with umbrellas and there are plenty of tables scattered about. We had no interest in watching the t.v. by the pool. That was last March. In fact, I only saw one cabana in use the whole time we were there. JMO but you might want to wait until you get there before you reserve one. You may not want it.
It does seem like a great idea for a late flight though, so you have someplace to change if you don't want to use the gym, which is right near the pool area as well.