If you download a map mod like atlas, you can get an (albeit crappy) map of the instances, with markings where the bosses are. It won't tell you if there is anything special to spawn it, no, but those aren't THAT common.
Beyond that, wowwiki generally has guides for many of them. But I say just go ahead and say "I've never been here before." If someone knows the way in your group, they'll guide and you can use your map. If not, use your map and everyone's equal anyway.
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IDrownFish wrote:
Anyways, you all are horrible, @#%^ed up people
lolgaxe wrote:
Never underestimate the healing power of a massive dong.