I hope this helps: at this time, there is no way to tell you whether or not it will be a problem to fly into Orlando on the 26th, because we don't know for sure where landfall will be, when it will be and how large Wilma will be. Landfall is now predicted to be somewhere between Saturday night and Monday, depending on exactly where she goes. If she is a large storm, it is likely she will affect more areas than if she was a smaller storm. From all that I am seeing, she is growing larger. That means a wider area of damage. It doesn't have to be a major hurricane to do a lot of damage.
The best advice is to check with your airline (and your hotel) once the storm has passed.
Hope that helps!
Colleen