Help with card for wedding?

[ksoehrlein]

DH and I are giving his sister and her new husband 10-day Disney passes as a wedding gift so they can use a few days for their 5-day honeymoon and save the remainder for a future trip(s). I'd like to handcraft a card explaining this to them. (I told them ahead of time that we'd cover their honeymoon park admission as their wedding gift, but they weren't expecting 10-day passes -- and I want to be CERTAIN they don't just trash the passes at the end of their honeymoon, thinking they were used up.)

I was thinking of a tasteful black-and-white photo of Cinderella Castle for the cover, but I'm positively stumped as to the wording. Any suggestions?