If you're really starving for info on this, just google search "privy digging".. there's a wealth of info out there!! I've been learning a lot this way.. and there's more to it than just finding them, believe me!! -Charlie
Get info here, solid as rock, all that and a bag of chips. This guy is a moral digger and he even gives a sample of a dig request and plenty of cool stories. Prepare for a life changing experience.