Assign user edit access to specific node

I am trying to figure out if there is a *somewhat simple* way to assign 1-2 users edit access to a specific node that is created by the super user. What i have is a site for a state civic organization, and each local chapter will have a node on the site which the leaders of the local chapter will have access to be able to update a simple profile for thier local chapter. I have already created all of the chapter nodes, but I can't seem to figure out how to do this.

Any user who would get access to a chapter page would be already set to a chapter admin role, but I don't want every chapter admin to have access to every chapter page.

Is there a module that would combine the role based permissions with a taxonomy term? I have a taxonomy assigned to the chapter and the users to match them up (i.e. chapter x node is assigned to the chapter x taxonomy term, and user y is also assigned to the chapter x taxonomy term).