In life, people often act more like cattle - following the footsteps of the one before them. Granted, if short on time I wouldn't be against the idea of using a guidebook as a supplement for your travel information - rather I use them mostly as a guide for how to avoid tourist gathering spots... 'watering holes'. I would advise not to rely on them as one might a religious text or methodology - unless you want a very predictable outcome which I find utterly pointless. (of course, you needn't agree). Interacting with the local people is often very rewarding assuming you are able to comply with local culture/customs - you'll learn about things the guidebook isn't ever going to provide you. If you are ready to go to the slaughterhouse, get on that trailer with all of your brethern - otherwise, take a chance and do something different.
( testing the local spirits)