Congratulations! I agree with
@Meglen, go for if it is your dream wedding and can afford it...but there are other options.
My son and DIL considered it for 2018, but ended up with a fairy tale wedding at Wentworth By The Sea Hotel in NH (our home state). We hosted the rehearsal dinner across the street at Wentworth By The Sea Country Club the night before with a view of the Hotel. Both locations were 5 star and perfect in every way. We had dozens of international guests, a language barrier with some of the older attendees and wanted it to all "happen" in close proximity so guests could relax and enjoy. The guests rooms were gorgeous and views amazing. Service impeccable.
The wedding photographer from Texas, who travels the world to photograph weddings, said it was the best location she had ever seen. It was a Memorial Day Weekend celebration with guests staying for the weekend. I believe it is still the #1 Marriott in the world.
Expensive, yes! It was white glove service, filet mignon and lobster tail in a ballroom that felt like the ballroom in Beauty and the Beast. We hosted breakfast along with the brides parents the next morning. It was better than we could ever have imagined! It was less than half as expensive as a Disney wedding and felt like we rented a private island for the weekend.
We've been to WDW dozens of times, but personally I just think it is too busy and stressful a location for a wedding. It's a great place for a honeymoon though! Whatever you decide - enjoy!!