If you are as talented a traveller as I, you can get lost even with a GPS. I wandered around the Dakotas, Nebraska and there abouts a couple years ago and I was using google maps in conjuction with my GPS. Seems I typed in a coordinate that was a little off. Well, it was a nice ride anyways. Got to see some storm chasers going the other way just before the tornado showed up in the distance.
I have a Garmin Montana 650T for everything. Hiking, climbing, car, bike and a backup for the boat. I can load all kinda of maps. Topo 7.5 min, the entire country road maps, satellite maps, marine maps ect.