I would like to be able to use my 3G iPad for taking a road trip without activating 3G. Does anyone know of an iPad or iPhone app that will enable the downloading of maps that I can then use with the ipads gps to track my location? I know that I can access google maps and pan around and the iPad will store some of the maps, but after a few miles of driving, I "go off the grid" and the map disappears and I just appear as a blue dot in the middle of a gray sea.l