I am able to use the entire Italy Isola with my 32 people as long as I use the "Oprah" round table. At the same time, I have having both a rehearsal dinner and dessert party there all at once. I'm not sure if you can utilize the "Oprah" table for just a dessert party though, which may be why everyone is saying there is a higher min. We are assuming that after dinner, gifts, and speeches seated at the "Oprah" table, people will probably stand (or bring chairs over) and gather at the waters edge during Illuminations, but the rest of the area will be for the buffet and perhaps a cocktail area if I decide to do so. Sorry I didn't think of all that before when I posted!
Here is a picture my coordinator sent me of the Italy Isola area, and she pointed out to me where the West Wing is in comparison (seen in the back of the picture.) I added in the text and highlight of where the West Wing is located, so it's easier to see.