There is some paperwork that needs to be provided to have a civil ceremony in Aruba.( see below- I got it from my WC) If you go this route you have to get married at their City Hall first. If you decided to get married legally in the US you must provide a copy of your marriage certificate for a marriage blessing.
In order to have your civil ceremony in Aruba, the following documents need to be submitted weeks prior to your chosen wedding date:
1.Completed Letters of Intent. Bride and Groom must each fill out one of these forms individually and sign at the bottom.
2.Birth Certificates of each with a Raised Seal and parents name stated on them.
3. If divorced an Official Divorce Decree or if widowed an Official Death Certificate
4. Negative Statement of Marriage for both. This is a documents obtained either at your Civil Registry, Department of Health or Bureau of Vital Statistics. It is a search of your records stating that at the current date, both of you a not married and therefore free and eligible to marry each other.
5. An Apostille Report from your State Department (Secretary of State) certifying the authenticity of your Birth Certificate and Negative Statement of Marriage.
6. Copy of Passport ID pages or a valid ID for both of you as well as for your two witnesses.
Hope that Helps!