We are staying at the Grand Mayan in Nuevo Vallarta in June. It is a timeshare so I'm not sure what the prices are if you aren't part of it. But there seems to be a lot of kid/family friendly things to do (lazy river, wave pools, water slides, kids activities, etc). It is not all inclusive, but we plan on going to Walmart and stocking up on drinks and food. This way our guests can spend as much as they want instead of forcing them to pay for the all inclusive rates. And we are getting married at Las Caletas! check out the thread, there is a lot of info on it!