Thanks for all the replies.
It is sort of a wedding-y occassion. I will make DH wear a suit and tie to match. We will be having a first anniversary celebration with a recreation of our wedding cake. We wanted to do something special for just the two of us because after the wedding we really didn't have any time to ourselves (with all of our family being there) And also, we did not have any of our wedding cake after the cake cutting because it got smooshed in transport.
We may "possibly" do one of the photo shots before or afterwards.
Deep down, I really wanted to wear it there, but after reading some of the posts about it being too overdone, I am still on the fence. But then again, it's not like I know anyone there, so I can wear whatever I want.
(Now, whenever one of you goes to Citrico and sees a girl in an evening dress, you'll know it was me from the DIS...lol (if I decide to wear it) )