Mind emailing me? You don’t have contact info in your profile. I’d be interested in hanging at a library for a few hours with my laptop and have some questions before going.
To whom is this directed? If it's to me, just write your question here. I've pretty much already explained how it works. Go to the Hathi Trust login screen. Pull down the list of partner institutions. Go to one of them in person. (or get a Library of Congress card, also in person.)
After the institution logs in, you can download anything you want. Bring a flash drive or portable hard disk and take home your PDFs.
I'd recommend calling the partner library first to make sure someone there knows the Hathi login. It's not that popular a resource, sadly, and many people have no idea what it is. You may also find a friendly librarian who is willing to do the download for you and email you the PDF, saving an in-person visit.
One thing to note: You don't have to be a student to use the resources of university libraries. They're open to everyone.