Relying on GPS is an excellent way to get hopelessly lost. I use the top of the line Magellan for work and play. It is amazing how often that thing does not know where it is.
The trick to not getting lost is keeping tabs on where you are, even when using a GPS. If you do that, you'll know when the GPS has gone of the rails in time to keep from losing yourself.
Sounds like you better get a better GPS. Garmin makes some good units you should take a look at...
