welcome to the notepad++ community, @k.d.google
are there really no trustworthy community members or other code contributors that could be watching over the wiki?
there are, but an extensive documentation, and any form of writing and/or adapting manuals, consumes a lot of time.
an optimal developing ratio, in regard to code change documenting, writing guides and training, is about 1:2, which means that for every hour of developing time, an enterprise has to calculate at least two additional hours for documentation and user training.
this would, imho, be excessive for a project of this size, as it is not enterprise driven, and hence the wiki might look a bit left aside at the moment, trivialised speaking.
we do, on the other hand, have the privilege of enjoying the presence of a lot of good external developers and power users at this notepad++ community, who can probably answer many of your questions, or give you a guide.
do you have any specific question, you still would like to have answered about plugins or any other topic, where you were not able to find a guide that applies to your specific notepad++ version ?