I'm no authority on New Orleans cooking, but I know Evanston. All of the suggestions below are within a few blocks of campus.
If travel to Heaven on Seven is not an option, Dixie Kitchen in Evanston offers some servicable Southern food with a few dishes the layman associates with New Orleans. It's not at the level of Feed or Wishbone, but it is within close walking distance of campus. Po' boys and the like. Fake Southern kitsch decor. The young person in question may already have discovered this option. It's OK, nothing great.
BBQ options are Hecky's and Merle's, though I am not sure if this will fill the bill. I'm not a fan of Merle's, though some may disagree, as it is always packed on weekends. It never made it to the second-visit stage with me, though I do remember a nice variety of sides.
Then again, Hecky's delivers, making for an exam-crunch treat. I like their sides well enough, especially the greens. I'm not as big of fan of their soft ribs, (being from the GWiv school of BBQ practice), but their smoked turkey legs with sauce on the side are very good. Their smoked duck rocks, but you have to order ahead.
The New Orleans BBQ shrimp at Davis Street Fishmarket used to be a favorite, but since they went upscale, the atmosphere is not as welcoming and the menu not as interesting as it used to be. Those BBQ shrimp were still on the menu when I last visited, and they used to do a decent blackened redfish from time to time. It's been turned into a "nice" restaurant --the sort of place where you take your boss or your grandmother.
Fried Chicken is always comforting and a treat. Evanston Chicken Shack for fried chicken and catfish is a board favorite. They have fried okra as well as red beans and rice, cole slaw and potato salad (I have not had any of the sides. Perhaps others can comment.)
Dixie Kitchen
25 Church St.
Evanston, IL 60201
847-733-9030
Hecky's BBQ
1902 Green Bay Rd.
847-492-1182
Davis Street Fishmarket
501 Davis
847-869-3474
Evanston Chicken Shack
1925 Ridge
Evanston
847-328-9360
Man : I can't understand how a poet like you can eat that stuff.
T. S. Eliot: Ah, but you're not a poet.