It will certainly create a lifetime memory for you and all of your guests!
Today there are numerous professionals with plenty of experience to assist you to create a wonderful destination wedding.
From the ceremony point of view, be sure you check into the cost of a license for those coming into another country to marry, and how far in advance the license must be applied for in your chosen destination. It's likely you will need your passport, or some definite identification, and an application form. Be sure to find out who is, or can be, licensed to perform the ceremony for you in your destination. You may want to pay to bring your own officiant to be sure the ceremony matches you perfectly, if this is possible.
Know what the wedding and honeymoon destination weather is like in the place you're considering for the time of year you plan to be married, and what activities are available nearby for guests who want to arrive early or stay late to make a vacation of their time away.
Find out if vaccinations are needed, or visas required that must be applied for in advance, and get that information to your guests as soon as your destination and date have been planned.