I agree, use what you have if you can, whether its GPS, the sun, the stars or a compass and map. Just as an example, I spent a short time working with the MNRin the Hudson Bay lowlands where the land is flat as a pancake but the willow grew thick and about 10 ft tall. You couldn't see 20 ft unless you were on the banks of a river. The natives there showed me a few tricks. Firstly, moss grew on the south side of trees because of the shortage of daylight. Secondly, they showed me the seashells. When the glaciers retreated and the waters ebbed, the open ends of the seashells filled with fine sand, then weighted down as they now were, spun with the receding water and all pointed to the north. One old guy who was showing me this stuff looked at me and laughed, and said 'You can never get lost in this country' I was suitably impressed with this crusty old gent. And I guess this points out the fact that being a southerner is all relative.