Stephen,
I found the authenticated users doesn't work since these systems don't authenticate.  I set up a PC (W7) with a share and had to change it to "everyone" to let them in.  Authenticated users didn't work.
I don't think a dedicated SVM would be the first choice.  I'm going to look at setting up a Server 2012 VM (our cluster has DC so no license issues).  I'll just give it some space, let them transfer, and do a sweep every 5 minutes, then delete it.  Since the data will end up on the NetApps I was hoping to just skip to the end :-)
Alexander, thanks for the links.  I'll look around on the dos page and see what I can find.
Jeff