My wife and I get lost as well. It seems infrequent, but unfortunately when it happens it is epic and horrible. This is exactly the kind of thing I was looking for -- something one would never know prior to owning the device, but could share from beyond the curtain. Thanks.

ETA: I don't have data, but in researching this more found a couple of programs that appear not to require data plans and yet still navigate with GPS-unit-containing devices (CoPilot and nDrive are the ones I've found so far). Thus, I may be able to get the use of a tablet, continue not buying a data plan, and also have GPS capabilities.