Yes, because it seems very likely that they have Captain Jack Sparrow there with a cutlass saying:
"Put the Mickey Ears on or walk the plank!"
All kidding aside, I have seen a number of people who had gotten married at the parks or were honeymooning aboard with the ears on. But I have also seen a good number who were not wearing them, so I think it is a safe assumption that it is up to the bride – the groom should be taking instructions by that point.
(j/k, I am sure both the bride and groom can decide each for themselves)
If you are required to wear the "wedding ears" that could be a deal breaker.[/quote:p1w72oyd]