If you are having a hard time coming up with clues, here is another idea.
I surprised my wife for her birthday with a trip during the F&W. I arranged everything and got the okay from her business partner and co-workers. I packed all the clothes, make-up, etc that I thought she would need plus a change of clothes for the airport. She got dressed as usual for work in her scrubs and I took her to breakfast that morning (which was near the airport). We have a small local airport which I typically cut through and around to avoid rush hour traffic.
I told my wife that a friend of ours wanted me to switch by the airport and pick up some brochures as his family was coming to town to visit. I then pulled into the parking garage and my wife turned and asked, "Am I not going to work today?" I said "No" but we are going somewhere. I didn't tell her where we were going but I knew that flight connected in Charlotte so I was safe with hiding this info until we got to Charlotte.
Prior to the trip, I had made a brochure / booklet about the F&W including information about where we were staying, photos of all the food marketplaces, prices and photos of all the food, and information of Mickey's Not-So-Scary Halloween Party (which I got tickets for). I started with the booklet you get in the mail from Disney when you have an upcoming trip and just expanded on it. I have a friend that works at a publishing store so I had him put the final pages together to look all official-like.
When we got to Charlotte and around the corner from our connecting gate, I pulled her aside and gave her the booklet. I told her "Happy Birthday, you are going to Disney World".
She was completely surprised and totally loved it. The only thing I forgot to pack was a belt...and oh, something for the
MNSSHP, which we ended up buying Tigger ears and tail for her to wear.
Like I said, just an additional idea if your first idea doesn't work out.