To whelm actually just means to engulf or surge over. Therefore to overwhelm is to submerge in *something*. Literally that something should be water, snow, debris, but metaphorically, it has come to be understood as an emotional state. To underwhelm ...
most of these websites have the Revelation Style: 11384
Go to the Sandals website, there are so many things to do, you won't need to go outside. I would not go wandering around. From what I understand, what ever you want or need can be accommodated by the staff. Have a good trip and be safe. s