I think you are correct, you do have to set them up one file at a time. Once you have them set up, you can publish the PLT files as many times as you want throughout the life of the project and they will always be current.
In Plotmaker, create a new Viewset, and set its Viewset Publishing Properties > Publishing Method to "Plot". Then drag the sheets you want into the right-hand side of the Publisher. If you want the whole book, just drag the layout name over and it will create views for all sheets in the book.
Select all sheets, and set the Plot Setup.
Select your first sheet, and set the Plot Settings> Plot Destination to "File". Click Save, and it will ask you for a name for the file. It will default to the number & name of the sheet. All you have to do is provide a location.
For each additional sheet:
Select the sheet, change destination to "File", click "Save", then "OK".
When you are done, either Save the viewset or Publish immediately.
All this does is set up the Publishing settings. Yes, it's time consuming, but once it's done the first time on a project, it will run whenever you need it.
Tom Waltz