honestly, i've never had any problem returning to the States as far as security is concerned. I'm always searched more thoroughly leaving than returning. I mean, I could literally walk through with it in my pocket. Hell, I did when coming back a few years ago.
Realistically though, it's not even worth bringing back. 60% of drug smuggling busts in the US are people returning from Jamaica. Is it REALLY that worth it over a couple grams of mediocre at best bud? Obviously not.
But if you're insistent on bringing it back with you, what I've done in the past is to wrap it tight in a baggie, then coat that baggie in peanut butter and wrap it again inside another baggie so as to help conceal the smell. Once bagged, wrap in electrical tape or duct tape and make it dick shaped....strap that shit to your johnson and walk on through. I've even been patted down/selected for inspection when doing this and gotten through scott free. You have to be able to maintain your composure under stress though. When I was selected for search, my heart dropped through my shoes, but I'll be damned if I let them see that. They see you freak, or acting all sketched, and you're sure to get busted.