I've only seen groups try to contact a sage when it has been previously established in the adventure that one exists. If the DM doesn't purposefully expose a learned person to the group, there is not an expectation that one can be found easily.
I wouldn't use the word "Sage," but my players frequently try to gain information about the dungeon/adventure/whatever.
Usually they go about it by speaking with the locals. "Hey, what do you know about the haunted castle up in the hills?" If an NPC gives them a quest, they always interrogate the NPC about any expected opposition. "Tell us about these 'devil creatures' that kidnapped your daughter."
Which, frankly, makes more sense to me than going to "a sage". Why would an old guy in a tower know anything about the monsters in the local dungeon? Far more likely that the town guard, traveling merchants, and local hunters would have an idea what perils to expect there.
I wouldn't use the word "Sage," but my players frequently try to gain information about the dungeon/adventure/whatever.
Usually they go about it by speaking with the locals. "Hey, what do you know about the haunted castle up in the hills?" If an NPC gives them a quest, they always interrogate the NPC about any expected opposition. "Tell us about these 'devil creatures' that kidnapped your daughter."
Which, frankly, makes more sense to me than going to "a sage". Why would an old guy in a tower know anything about the monsters in the local dungeon? Far more likely that the town guard, traveling merchants, and local hunters would have an idea what perils to expect there.
3e and 4e seem to put more knowledge and information gathering abilities in the PCs' hands directly, so there is less need to outsource it.