teknitroxdiver
Contributor
Everything mentioned is good but if you pay attention to your DM and group you should be good. Just did Coz: underwater light(compact) , anti -itch creme, underwater camera! are great, I wish I had taken them. I never did see the biodegradable sunscreen in any store in Coz, Playa del Carmen or Isla Mujeres. Take sunscreen with you it is expensive there. And do not put in your carry on.
A few other things: don't change a lot of your US $$ to pesos. It does not benifit you too much. And it is very difficult to get US $ in MX. It is easier to get pesos from an ATM.
What I did was open a seperate checking account at my bank and put $$ into it so I had a seperate debit/ATM card to use. And when I needed to add more money I transferred it online. I did this because I have automatic deposit with paychecks and auto deduction for my bills and morgage. I just did not want any hassles with my primary checking account.
It's only difficult to get USD changed to MXN at a bank. Any of the zillion exchange houses are no problem at all.