Ever think of surveying your way to a geocache instead? Yep, it can be done, it takes considerably longer, but you can triangulate using a good compass to a fairly high degree of accuracy if you know what you are doing (a rangefinder is a pretty good cheat tool).
_________________________
The ultimate result of shielding men from the effects of folly is to fill the world with fools.
-- Herbert Spencer, English Philosopher (1820-1903)