Cococay is great. Yes, lunch starts at noon but will go on for a while. Don't worry you won't go hungry and if yo miss it get onboard and go to the Windjammer.
You can just relax in a lounge near the water with some Coco Loco's but if you feel you have to do something, do the Waverunner tour. Great!!!
If you see this lady, tell her I said HI!