Since we don't know each other very well I can't judge if this talk of Waterdeep is IC blabber for flavour or if you're serious. I'll get a little meta here. If you go to Waterdeep... well, I won't force you to interact with what happens right now on the sword coast of course but you'll write that character right out of the game. If that's the case you're welcome to create a new character that has better motivations to dig where you stand, so to speak.
I also would appreciate help to keep the party gathered, in the larger sense (splitting up while exploring and such is of course fine). I'm not running a multi-party game, I honestly don't have that kind of time.
Maximillian Yragerne:
Reevor is in the Library Clay, he isn't going to Baldur's Gate, Beregost or Waterdeep! Not sure who we're meeting in the Friendly Arms, no name was mentioned.
The letter mentions Khalid and Jaheira. It's in the journal.