So we navigate mostly by dead reckoning, and deduction from what clues we find. I keep a compass in one pocket for overcast days when the sun doesn't show directions and have the map mounted in a special carrier on top of the gas tank where I can keep track of miles from the last junction and know what to look for. With those tools and a lack of pressure to 'get somewhere' it works out fine and we just about have America all to ourselves.