Everything can be seen here in the two images from my imgur link.

The fundamental problem is that, if I try and set the last column to the max width that can fit in the page, it automatically makes all of the pages to the right of a filled page active. I can reduce the column size until another column can fit in, but then I have a blank column on my page.

I just want my last column to be max width without having to worry about creating extra pages =/

Try using...Set print area and/or Scale to fit. See how you get on....

Will do, thanks. So I'll have to manually set it every time I do get to a new page?

Yep, but you could also try playing around with the table properties and other page properties. Try and create a template to use that is saved/formatted how you want it.

Or ..

You can experiment with this approach:

https://msdn.microsoft.com/en-us/lib.../ff839804.aspx