Scott,
Pasquale is right about the folders, that is going to be the easiest way to report on a particular set of APs.
Here are some screenshots for the process:
1) Create a folder:
2) Add a new report definition:
3) Customize the new report:
3) Define Folder scope:
You also need to set the schedule for the report to fit your needs, but the new reports will show up in the "Generated" subtab of Reports when it is run!
Hope that helps!
Aaron