Congrats on your engagement. My fiance and I got engaged in Turks in April and are going back for our wedding next June. I almost have my hotel contracted, but have a ton of information on Turks that I would be happy to share.
If you plan on having a wedding planner, I would suggest starting there as they can help guide you through the location selection process. I have been communicating with Diane at Island Harmony and she is amazing. Having been a wedding planner in my past, I can tell you she is fantastic.
If you do not plan on hiring a planner, please let me know what you are looking for and I would be happy to provide any insight from my research!