I just got back from Coyaba yesterday. i was married there on November 7th. Go there!!! it was just so wonderful, i cannot say enough good things about it. I was like you, looking for a smaller resort. I wanted a more personal, intimate experience, and we got it. We had about 40 guests, it was a perfect size. Big enough that guests could do their own thing (or go on an excursion, which coyaba was SO helpful with), but we could all meet up and spend time together.
the staff there has amazing attention to detail, andthey were just so nice and accomodating. I felt so special each minute, and we didn't have to worry about anything. The property was gorgeous. We got hit with a hurricane and had to do the wedding in the Vineyard (open air restaurant), and it was still gorgous. I didn't have to stress the rain, Alex, the manager, took care of it all to perfection, and the stars came out for the reception!
Highly highly recommend. Please let me know if you have any questions!