Hi! I myself will be planning my own wedding in Mexico. I visit Cozumel and Playa del Carmen at least twice a year. If you are staying at a resort, you can try to contact a coordinator via email and see what packages they offer, and how they can accomadate your needs. If you have gone through a travel agent, they can assist you as well. In August my fiance and I went to the Mayan Rivera. The resort was beautiful and had much to offer for the type of wedding I want. I decided to meet with the concierge one afternoon and she went over several packages they had to offer. Playa del Carmen is beautiful and the weather is gorgeous in April. I'm sure you will have an unforgettable Wedding at a great cost!
Good Luck! Jenn