machineelf
Explorer
That is not a bad idea, but I personally prefer the Yawning Portal idea. Partly that's because I have no problem imagining, as others have said, that these stories have been told and retold in a famous tavern where many adventurers and locals gather.
I also want to run a main campaign with my players where they visit Waterdeep from time to time (or have much of the campaign be in Waterdeep). And when my players want to run a side-quest or a one-off with different characters for a break from the main campaign, they can go to the Yawning Portal and hear Durnan, or others in the tavern, tell stories they've heard of adventurers from distant lands venture into dangerous ancient dungeons. As the story begins to be told in the tavern, we transition to the one-off side-quest for my players. It makes for a great story-telling technique and transition.
I also want to run a main campaign with my players where they visit Waterdeep from time to time (or have much of the campaign be in Waterdeep). And when my players want to run a side-quest or a one-off with different characters for a break from the main campaign, they can go to the Yawning Portal and hear Durnan, or others in the tavern, tell stories they've heard of adventurers from distant lands venture into dangerous ancient dungeons. As the story begins to be told in the tavern, we transition to the one-off side-quest for my players. It makes for a great story-telling technique and transition.