@@TheBHolders I am less than a month out to my wedding at the Moon Palace so I'm working out some of the same details you are! Also, I have been there twice and have a pretty good handle on the layout and different locations.
This might not be ideal but I did want to mention that they have a nightclub at the Moon Palace - Club Noir over in Sunrise. Last year when I was there a TON of guests from a wedding came over after they were done. It gave some of the younger people who weren't done celebrating and dancing a change to keep the party going and they had a blast! It opens Tuesdays, Thursdays, Fridays and Saturdays. You could always encourage everyone to after party over there!
Also, I am aiming for a 4pm wedding. In the winter months the latest they will do the weddings is 4pm. I haven't worked out the details of getting ready for the day yet but I feel like 4pm will give me enough time to get ready and get some pictures in before. I have never been to Mexico in the summer though so I can't really say how bad the heat might be