Quoting Subtle As A Hurricane:" DH and I got married at the courthouse, so we have been talking about doing a nice ceremony for our 5th ... [snip!] ... dance. Would it be weird to have my brother stand in his place? Or one of my uncles? Any other possible suggestions? "
You could skip the father/ daughter type of dance all together. You are basically doing an anniversary/ recommitment event. They are typically less formal. Not like a backyard BBQ in a building but, there aren't really "rules" that you have to follow. You could just skip that part of the event all together. Make it all about you and your husbands recommital. You aren't being given away so I don't see where that type of dance is necessary. IF you want one, I would pick the person that you rely on most.
Sorry for the loss of your father.