Mine is 11, and she still does Pixie Hollow and a few other characters. But yes, the desire to hang with characters seems to be waning.
She loves to shop, so I make sure we stop at several stores each day. She saves her allowance before the trip, and also receives a certain amount in gift cards from us when we arrive. That makes shopping more fun for her, it's "her" money.
Before the trip we do manicures, with a Disney theme. Each morning her hair is done as nice as possible, sometimes with special hair items purchased for the trip.
Maybe ask her what food she wants on the trip, there are several websites with menus that you can study together.
Is your daughter into any celebs? If you Google their names/Disney, you may be able to find pictures of them enjoying rides at DL or WDW to show her.
Best of luck to you, I'm sure she'll be excited once you arrive.
