And, using the work @Aleranicus had us do with creating spots in the city, what places do you think it's best to start this in? I think, given the large numbers, we need at least a couple.
Any place that allows characters to discreetly meet seems good in my book, unfortunately/fortunately that means most of the locations written up would be good options. :D
Also, for the purposes of the RP, I want a clear sense of why your characters are opposed to Nemsemet.
Humorously, Violet might share a similar motivation to @Utrax's Stella, Nemsemet looks unlikely to good bad for her business, protecting the park. I also imagine dryads, well-connected to nature as they are, have at least a slight aversion to the undead or at least with the idea of the undead suddenly gaining enough influence to take over the city (death is after all part of the natural world). Violet was not a huge of fan of the late Count or the status quo of the supernatural world, but she's also a big believer in maintaining balance in the world and a mummy based dictatorship is not very balanced.
In addition, while Violet may not primarily be concerned with mortals, she also doesn't hate them or really view them as lesser, if anything she simply views them as misguided children (with a unfortunate habit of harming nature). In a terrible comparison, she's a bit like the elves of LoTR, in that she still thinks human beings have potential and she's more of a fan of discreet/subtle guidance than using violence to force others to change.
With that being said, her main concern is the trees she protects, so a lot depends on how Nemsemet chooses to act.
If anyone is around, we can set up a collab or whatever.
I'm on a lovely break (for the next couple of months), so I'll be on in some capacity consistently throughout the week, when not busy with social things (I can have a life again!). :)