I would honestly call someone and ask. Maybe at Chase and/or DLP. Because if not, you might only get 1% back. And I am guessing you likely have another card that would offer better rewards on that spending than 1%, if for some reason it does not qualify as 5%.
If your purchase is directly through Disney. I think it is highly likely it would apply. (A recent
DCL Deposit, paid through a
travel agent qualified for 5% back for us as well). But for a purchase that is (i am assuming) that large, I would call to confirm first.