When stooging about over the Arizona desert for hours at a stretch this thought often crossed my mind.
As s-slag says use altitude to your advantage and it's amazing how many little airstrips appear out of nowhere.
Failing that in the desert it's tracks which are the only things with a chance of being boulder free.(unless you count the Colorado river.). But watch the wires:
Remember: take plenty of water with you......................
Safe flying
Cusco.
