Ask to see a menu before you eat, check it out see if anything tickles your fancy...Take a look at the conditions of the place..if you hear the moo of a cow in the back, I would say moo-ve on ( <- BAD JOKE)
The best people to ask about where to eat is people who live where you are treking, wether it guinee pig in Peru or a hanging duck in Beijing China the locals will have all the info you will need..just ask about an someone will lead you in the right direction....
I walked for an hour one time in Havana because someone told me the best fish in town was served in this restaurant...And it was worth the walk...the walk made the meal that much better!!!