Semi-off-topic, but I would make sure you have a few dollars in change in case you end up at an unmanned toll. We have been successfully using the GPS on our phones for a year and a half now instead of borrowing my parents hand-held gps when we travel. We had so many problems on this trip! The directions were awful, we would have been better off using intuition alone. We ended up at two unmanned tolls. The first I had enough change, the second, we were 10 cents short. DBF spotted a dime someone had dropped on the ground, opened the door and scooped it up. Luckily nobody was behind us until we dropped the last dime in so we didn't hold anyone up. It was good for a little chuckle.