Someone above referenced the Cinderella's Royal Table Engagement package and I wanted to jump in the conversation to add that I would highly recommend that package, as well. I proposed to my wife at CRT in 2015 and it was a fantastic experience. You get great seats near the large windows looking out on Fantasyland and you get a great meal. The whole experience is planned perfectly.
At dessert, they bring out a covered plate full of rose petals with a glass slipper. When the waitress removes the cover to show off the roses and the slipper, you start your proposal and a photopass photographer will be able to capture every second. We treasure all of the photos we got from this experience. We got tons of photos from the experience. Afterwards, they will take additional posed photos with the couple, the ring and the roses/slipper. Each princess also stops by to wish you congratulations.