Owners of Retro Sno operate three food trucks citywide Keith Williamson and Morgan Williamson A shaved ice treat provider will establish a four-month single-site food truck presence this summer in The Nations starting in early May. Retro Sno will operate its truck at 806 51st Ave. N. in the heart of the mixed-use district and next to the structure housing food business Tin Wings. It will offer picnic tables on the site. To date, Retro Sno co-owners Morgan Williamson and Keith Williamson (who are married) have operated the business via three food trucks in various Nashville locations since 2012, having started with one truck. Once set in The Nations, the Williamsons will continue to have the trio of food trucks operational throughout the city.