Hi, I don't have any particular advice for you, but can relate to group booking stress - it is actually the only part of the process that has been stressful. For us, despite the fact that we invited about 150 people, it was a struggle to get enough people to book (10) to keep the group rate. In fact, we booked the 9th and 10 person today and it was the very last day. We came very close to losing the group rate for our guests and our $2000 deposit. Problems included that lots of people chose to travel on different days (we picked Sun-Sun with our wedding on the Friday), very inconvenient flight times (leaves our city at 615am, and then on the return from Cancun, lands at 330am! big mistake to set up the group booking before flight times were available), and that the price was ultimately only slightly cheaper than what you could find on the internet. Ultimately, our biggest problem was the travel agent herself - any "perk" that we found for our guests we found ourselves and had to push the TA on, and she was not very knowledgeable about room types, etc. If I were to do it over again, I may select a good travel agent for people to contact, but would not set up a group booking - we found it too restrictive.