Can't help with Mexico, but just wanted to say CONGRATS on your engagement I'm getting married in the DR and the bus ride had to be short (request of my parents) so I looked in the travel catalogue, and they tell you the distance from the airport, I was able to eliminate a bunch that way... and then proceed to eliminate all the adults only, and then all the too expensive ones.. you should end up with 3-5 resorts, you look at reviews on tripadvisor, pictures.. and you should be able to make a choice ! Good luck !