I agree with grover...
We had a Cusotm Wedding at Disney, and it was the best thing I have ever done. My husbands family was SO AGAINST it b/c they had to travel, so most of them did not come... Out of approx 100 guests, he had about 12 family members there. But, we did what we wanted to do. We get to do something like this once, and we wanted it at Disney. They were all very upset, especially his mom, so it made for VERY UNHAPPY planning! Needless to say, it turned out wonderful and she is now so happy we did it there, b/c she saw how happy we were and how beautiful and magical getting married at Disney was. They have also all gotten over it. We are having a party here in the next couple months (decided to wait for summer and warm weather) for his family. I really hope you are not sacrificing what you really really want! Getting married at Disney had been my dream since I was a kid, and something he really wanted as well. And as bad as we felt that his family wasnt coming, we wanted to remember our special day at Disney.
Good Luck - I know planning is tough, but it will all work out in the end!!!
Jamie