So I've been digging through the source books available to me (Your Story, Our World, and Accelerated, no Paranet Papers just yet) and I've found some information I thought useful for world-building as it pertained to the White Council was missing (and I couldn't find more than brief handling of the subject in the novels), for the purpose of running a campaign that hews reasonably close to the novels in larger-scope setting details.
In general, my questions deal with just how many wizards there are, and wardens in particular, and how they're dispersed.
Re: the Wardens
In the novels, although the Warden's overall strength is detailed a couple of times, and the spread of Harry and Ramirez's duties as regional commanders are mentioned once or twice, if I recall right, but it's never really gone into how many other US wardens there are, and what, if any, criteria are in place to decide whether or not a city gets a warden posted there.
Re: Wizards/The White Council in general
Other than saying that they're not very common, or even outright rare, to my knowledge there's no rough estimate for how often practitioners of White Council-caliber/skill-level occur relative to the general populace. For instance, it seems like there are, at the least, several thousand Council-members, and yet Harry (and later, Molly) are the only Council-level practitioners we see residing in Chicagoland, which is one of the largest metropolitan areas in the US. To give some shape to the question, if I were building a campaign set in the DC-Baltimore metro area, and I want to keep the Montrose's as part of the local lore, I'm curious as to if it would be stretching credibility in-universe to then throw at least one more family of wizards on that, and probably another major magical talent coming from a non-practicing family.
On a related note, it's also unclear if White Council-level talents always have to be the offspring of other comparably strong-practitioners, or if it's possible for a child to be "a notch up" from their parents, born either to minor practitioners or entirely non-magical parents.
The Skinny
In light of the above problems, I've been rereading the series to see if there's additional information, but thus far I haven't found any. Is there any canon I'm missing or, failing that, reasonable work-arounds or setting background that you all have found useful and in-fitting with the larger Dresdenverse's themes?
Oh, also, hi, I'm new here. Good to meet you all!