Charles, it sounds like you have an amazing grasp of the Realms and put it to great use in your campaign. I really like what I'm hearing. Reminds me of the Manhattan of Marvel Comics, with lots of overlapping storylines and superheroes flying past the office window. My approach is different. I have only a modest grasp of the Realms. I unapologetically cherry pick those parts that I find appealing and useful. The rest I throw out or change beyond recognition. For example, if I was going forward with the notion that Rivergard Keep was in Waterdeep, I'd make it the harbormaster's house, have him be an agent of the Water Cult, and fill it with sahuagin. For no other reason than that sounds fun to me.