Also, I recommend going to www.mapquest.com and getting driving directions. They are not always 100 percent correct, but they were pretty good with the ones we just used on our Orlando trip. It's always a good backup to have.
There will be lots of signs to get you to WDW, and once you are on WDW property, their signs are great.
Barb
Visit the Platinum Castaway Club at: www.castawayclub.com