Here are some food recommendations if you go to Fayetteville. It really just depends what you want. Dickson St. is the main bar strip and visiting fans usually have a fun time before and after games there.
Herman's Ribhouse (Hole in the wall staple that's been there forever, sports memorabilia all over the walls from people who have eaten there)
Foghorn's Wings (50 flavors of wings, right next to Baum Stadium so you could walk to/from the game)
Hugo's (best burgers IMO, in a basement type setting on the downtown square)
Hammontree's (gourmet grilled cheese if you want something a little different)
Catfish Hole (where we take our recruits, good atmosphere and great hush puppies)
There is a ton of stuff to do outdoors in Northwest Arkansas but you probably won't have the time. If you're willing to drive 30 mins north to Bentonville, Crystal Bridges is one of the best art museums in the world. And the Walmart museum is kinda interesting. "Ann", the play about Ann Richards, is showing at Arkansas Public Theatre that weekend but I'm sure there are plenty of places in Texas it has been to as well lol.
Things to look at on campus: Alumni Walk (the names of every graduate are etched on the sidewalks), Indoor Baseball Practice Facility (nicest in the country in my biased opinion), Jerry Jones Student Athlete Success Center, Tyson Indoor Track Facility (Fayetteville has been referred to as the track capital of the world). There are many wild boar statues and figures on campus, one is a replica of a famous statue from Italy. Also if you care enough you can check out the football stadium expansion that should be 3/4 complete by then.
Wear comfortable shoes because the campus is very hilly.