The biggest mistake most people make is overpacking...you're going on vacation, not moving! There are stores in Mexico, with lots of stuff, so only bring what you really need. Here are some packing suggestions for your trip to Puerto Morelos:
Bring enough of your prescription medicines to last throughout your trip. You will not be able to fill a prescription in Mexico without a trip to the doctor, and who wants to do that on their vacation? Make sure to bring your prescriptions in the original prescription bottle to verify the type of medicine that is in the container.
Take a copy or scan the information page of your Passport and email it to an account you can get to from anywhere. If you lose your Passport, you may have to travel to Merida for a new one and having the copies will help. Also copy your travel insurance papers, fronts and backs of credit and bank cards. Keep all the copies in a safe place, separate from the actual documents.
Extra Eyeglasses or Contact Lenses
If you lose your glasses or a contact lens, it will be very hard to replace in Mexico. Bring extra and don't ruin your vacation by not being able to see.
Bring as many dollars as you are comfortable with, especially $1 bills that can be used for tipping when your first arrive. Everyone who helps you survives off tips. This includes baggage handlers and greeters as well as transfer and taxi drivers. Your can pick up pesos before your trip at a local bank or online at Travelex. You won't get the best exchange rate this way but it sure is convenient.
There are several ATM Machines around Puerto Morelos and the Colonia. Make sure and cover the keypad with your hand when entering your PIN number to hide it from curious eyes or a hidden camera. ATM machines in manned locations, like the Chedraui grocery store or the 7-11 in the Colonia are your best bet. Do not use an ATM machine that has loose parts or appears to have been tampered with...you might get home to a bad surprise.
Notify your bank and/or Credit Card company that you will be in Mexico and for how long. Some debit/credit cards will not work in Mexico without prior notification.
2 bathing suits, 1 to wear and 1 to be drying out
Some casual clothes, tank-tops, T-shirts and shorts that you can wear for more than 1 day
Bring something dressier for dinners:
Ladies- a sundress, skirt, or dressier shorts, capris, dressy sandals. Guys- nicer shirt with a collar, dressier kaki shorts, or long pants,dressy sandals, or shoes.
A light jacket if you're coming in the cooler months. Nights can be cool.
Comfortable walkng shoes, flip-flops, dressier sandals and sneakers if you plan to excercise
Beach and Outdoor Wear
Snorkel, Mask and Fins so that you have equipment that fits you
Bottle opener, Koozies and a collapsible cooler to keep stuff cold on the beach.
Biodegradable Sunscreen to protect you and the wildlife in the ocean
Sunglasses, hats and visors
A T-shirt to wear while snorkeling or swimming so you don't get burned
Basic medical supplies...bandaids, nail clippers-tweezers, antiseptic cream and pain relievers.
Bring your camera. There a lots of great photo opportunities. Bring an inexpensive underwater camera for pictures of fish or snorkelers.
Bug Spray, to keep the mosquitos and other insects away