This should be a no brainer. This is one of those times, when you look back and say, "Man, why did I do that." Even a Newbie knows that you will spend the week going thru security after security, you've heard people talk about smokers in the other rooms, what do you think they would do to you if they smelled it? I have never been to Jamaica, but from the discription, it sounds like a set up, so why willingly fall into it.
Don't mess up a trip you have been looking forward to for months, by doing something, that so many have warned you against.