Hi- Lots of the cruise lines offer wedding options both aboard the ships and at destinations along the way. If you're interested, you can read about options on different lines and get an idea of cost. I was married in Ocho Rios Jamaica and honeymooned there as well- although we married at a resort and not Dunns River falls- it is very full of tourists, I'll bet you can find a better venue. Good luck! Here's the info on the cruiselines wedding programs, if you are interested: