The MSMS Foundation reserved a block of rooms at the Courtyard Marriott in Columbus, MS. The discounted rate was only available until March 18, 2016, but their online prices for this weekend are pretty good anyway. It's a great hotel and still very new.
The hotel location is the Courtyard Marriott, 1995 6th Street North, Columbus, MS 39701. The phone number is 662-245-1540. Website.