My parents did not come to my wedding. I was DF too. (In fact, the reason for the marriage was to get re-instated)(how silly)
Do try your hardest to look at this coin on both sides. (I know its diffiCULT, and there is really no excuse for his behavior.)
Years after our wedding, we was watching the video of our wedding with my mom (who did not attend-same reasons as your dad), and she was in tears. (Mom was not a crier, she could hide her emotions on about everything.)
The point I am trying to make is that He Really wants to be there too! He just has his blinders on, and they are not coming off. Try to empathize with him before "bashing" him at the wedding. I am quite sure that if he wasn't brainwashed into thinking that its a matter of paradise, or not if he attends, he would be there. I see no reason to make any announcements, or put anything on the invitation. The way it worked for us was nothing at all. Either everyone knew already, or the talk went on behind our backs, either way, there was no talk (to me) of my parents decision to miss our wedding. We had a lovely time without them.
Good Luck and Congrats on your new Union...