Wow!
Let me think for 5 seconds.
Check out HB's suggestions and follow.
1. Fly to POP
1.5 Stay in Sosua
2. Any non AI or condo, (Book by internet, condos, accommodation Sosua etc.There are loads) they're all fine.
3. You don't need Santiago, but if you really want to go, let your new 'Novia" arrange Caribe tours, disc ,cabana and have a blast. Hands on wallet at all times of course.
4. Behave yourselves in public, to reasonable extent --not to be abusive or aggressive.Tipsy is fine, drunk tends to be preyed upon.
5. Passions is an experience, I'm told, not to be missed.
6, Please don't be the A** H**le tourist we see so much of and enjoy yourselves!
Learn at least how to say hello, thank you, thank you so much in Spanish and you will improve your standing four- fold.
Do not judge your host by your measures. Theirs are superior.