We have a large group looking for the very same thing! But mid February from Saskatoon.
We would be a group of 5 couples, 4 of them with 5 kids, ranging in age from 4 to 18.
I had already told them to look at packages to the Palladium and to the Barcelo hotels. Being able to snorkel from the beach would be a big bonus- any others in the medium price range with that? Or, close to Akumal so we could get there easily? How are the beaches at the Palladium and Iberostar....and, can you walk into Playa from the Iberostar?