I use expedia to buy. I dont like using groupon. Look into expedia with all inclusive hotel and flight. Cancun is little expensive. Playa de carmen is little cheaper. Once u look in expedia, look reviews in tripadvisor for that hotel N buy transportation from expedia as well. From airport to hotel. Usually early june and july is cheaper. One more thing, if you are enthusastic abt swimming with whale shark, there is a place in isla mujera island. Look into that as well. One of the best thing.. any way have fun. Carribean in beautiful. Only stay in all inclusive one. Its easy and you can enjoy your time there..