The "Budget Board" on disboards.com has lots of threads about how to use the Entertainment Book to your advantage in Orlando. If you are going to stay on WDW property though, you may be able to get by without a car. Having a car is handy though for going to a grocery store to get water and other basics, and to go to restaurants off property. And, some people just don't like to take the WDW busses. I'm one of them!