Originally Posted by
Danthecran
Maybe pick up an Ipad with 3g and then get a sim card (for data) while you are in france? It may seem like a lot of work but it would give you what you need and you get the benefit of being able to go online whenever you need it while you are on vacation (very useful to find restaurants, check email, etc).
The Navigon Europe app for it (and the iphone) allows for downloading maps while on wifi and storing them on the device.
I'm not sure how data connectivity would be in some of the mountainous areas I've driven through or may drive through, so went this route.