Thanks for your help everyone. I ended up getting a reservation at the Courtyard Marriot that is a few hundred yards north of the Hilton. They did 79 a night. I don't want to bother with a cab/shuttle so I went with this option.

For those of you wondering about the legality of the Delta rate, I asked them if they had a Delta Interviewee rate, and they said no, but if you can show the front Desk your Delta Interview letter at check in, they can give you the Delta rate.

Hope this helps someone out.