Hi Danielle-fellow mom of twins!!!
We have stayed many times off Walt Disney World property....and I will say that it is a different experience. I really do prefer to stay on site!
When you stay at a Walt Disney World resort, you are surrounded by magic!
For us....also a family of 5 it is easier to do more and see more when you stay on property.
It took the stress of driving to and from the parks away-which also saved us money.
You have to do what is right for your family. If you have never stayed at a Walt Disney World resort, it really is a must do. You will be treated so well and have such an incredible experience that I am sure you will always stay at a Walt Disney World Resort!
HERE is a link with more information on the benefits of staying on property.
Good luck in your decision.
Have a magical vacation!
Carrie