There are certain areas you're not allowed to go to at all, and all others have to be approved by the first O-6 in the chain of command. It specifically states that cruises to the unauthorized areas are ok(with O-6 approval) but you won't be allowed to leave the ship while docked at that off-limits port.
Not sure if other services will follow(or already are) but the new update came out today so I thought I'd share. This is also great for anyoe traveling out of the country for your honeymoon/vacation. ---- />
SMART TRAVELER ENROLLMENT PROGRAM (STEP). ALL TRAVELERS ARE STRONGLY ADVISED TO ENROLL IN THIS FREE SERVICE PROVIDED BY THE U.S. GOVERNMENT TO U.S. CITIZENS WHO ARE TRAVELING TO, OR LIVING IN, A FOREIGN COUNTRY AT HTTPS://TRAVELREGISTRATION.STATE.GOV/IBRS/UI/. STEP ALLOWS THE TRAVELER TO ENTER INFORMATION ABOUT THE TRIP SO THE DEPARTMENT OF STATE CAN BETTER ASSIST IN AN EMERGENCY. TRAVELERS WILL BE ABLE TO RECEIVE TRAVEL ADVISORIES, WARNINGS, AND OTHER INFORMATION FROM THE EMBASSY OR CONSULATES. 
MUST HAVES: Clothes, Groom
WISHES: Wedding planner(check!), Honeymoon, Blue Petyl Bouquet