Well I managed to get the file created, I had to use visudo to create a custom file with my edits.
I'm testing it now to see if everything works.
Really? It doesn't let you just sudo a file in the dump directory? I wonder how they are enforcing that?
Yeah, not sure why it was having a hissy fit over it, but I've got a good working custom sudoer.d/god file now that can be used for what I have, and I can simply cp that into the appropriate folder and reset the perms on it (if required) to get everything working.