I just got back a week long trip there in January! Definitely go if you have a chance. The people are great and the friendliest people. The seafood is some of the freshest youll ever find. It was a group of 5 of us on a surf trip...if you can provide more details of what you're looking to do I can try to help
Oystins/Bridgetown and the west side is the more popular area . Atlantic side has plenty to offer as well. We stayed up on the nw part of the island around half moon.
If you go, you need to experience Oystins on a friday night. Open market party with plenty of excellent seafood, music, and cold banks beer