We did the Sandals resort on St. Lucia for our honeymoon. It's a little pricey, but the resort and grounds were quite nice. They also had some sit-down restaurants so it wasn't buffet every meal unless that's what you wanted.
There's a lot to do, but they also don't pressure you to do anything if you just want to relax.
If it hasn't changed, it's couples only (no screaming/splashing kids at the pool) and all inclusive including alcoholic drinks and almost all on-site activities (diving, sailing, etc.).
To each his own, but we had a great time with no regrets.
P.S. Almost forgot ... congrats on the wedding.
