Absolutely! Don't hold back. Tell every cast member you encounter before and during your trip about your special day. You never know what might happen!
In fact, here's an idea --- During several of our family's trips, my dad would write compose a poem to the guest services folks at whichever resort we were staying at. If we were going to FW, for instance, he might include which loop we preferred and how close to the comfort station we wanted to be. It took a little creativity, but he really relished the work. Once, at POR, we got upgraded to a water-view room because of one of his little compositions. The folks at reservations get so many special requests, you know it can't hurt to make yours stand out a little.