Well, incorporate the ingredients that mark the moment as that of a princess, and we are positive she will be swooning. You have to take a moment to observe yourself and your surroundings, of course. What do we mean by that? Well, to tailor the surprised to your particular bride to be will the very thing that makes her day everlasting as is your love is. Or should be?
For example, if she is an absolute princess already, and provided you can rely on your own taste (or get some help), why not provide a gorgeous dress for her to change into for a celebratory dinner? This is one of the advantages of proposing BEFORE dinner. It is also less expected. That’s what we are about after all, the extraordinary.