Bring light ponchos for rain gear. These can be purchased from most camping stores. Many stadiums also carry a light poncho to sell to fans of local football teams. These work great as well. They are small and light and easy to carry anywhere you go as a rain cloud can come in no time and dump a monsoon on your head.
The Mexican name for the Atlantic coastal region of the Yucatan Peninsula is Riviera Maya. The English use is either Maya Riviera or Mayan Riviera. It is used all three ways in this web site.