Don't you need the 3G version that has the GPS chip built-in to have it act like a portable GPS (i.e. a Garmin, Tom Tom, etc)?Yes if you use the built in Maps app.
No if you use a navigation app such as Navfree or ZorroGPS that stores the map data to the ipad. App size is 2-3GB in for US for those two, not sure about others.
Don't you need the 3G version that has the GPS chip built-in to have it act like a portable GPS (i.e. a Garmin, Tom Tom, etc)?
Am I correct in assuming that if you buy the iPad 3G versions you essentially have a portable GPS, whether the 36 data is turned on or not?
So if I do this for a large area, like a state, would it cache that much area?
I have never used a GPS before, but am tired of printing maps and directions. If I get the 3G iPad, do I need a data plan enabled to use the GPS and mapping software?