Hi Jen,
I got married at OBB in July. I also never wrote a review, but fortunately I had a much better experience than DGG. I really loved the resort, everyone was so nice and accommodating, and it is (I imagine) a much better experience than getting married at a huge resort because not only is it gorgeous, but you have the place to yourselves, it is much more intimate, and it is easy to get around and find other people, which is nice when you have a smaller group.
That being said, you really can't have people staying at other places on the island. The hotel is simply too far away. We had about 50 people at our wedding, everyone stayed on property for at least 2 nights, some for more, and no one seemed to mind being secluded. We had lots of events and the staff is very friendly and easygoing about letting everyone stay up and hang out by the pool, on the beach, etc, so we never got bored.
I would write a whole long review but I don't think enough people are looking into this resort for it to be worth it. Feel free to message me privately if you have other questions!