The visit provided Williamson an opportunity to see one of his former Durham (N.C.) Jordan teammates, T.J. Thorpe, practice on the collegiate level.
"We caught up," Williamson said. "It was fun watching him and just thinking a couple of months ago we were hitting each other. Now he's on another level. It's just something to be happy about.
"[Thorpe] gives me tips [on recruiting] and what to look for, and how he feels about Carolina."
Off the practice field, Williamson had conversations with UNC assistant coaches Everett Withers and Troy Douglas.
"They just said just keep coming up there and this could be me in a couple of years," Williamson said.
Neither coach discussed the status of a possible scholarship offer for Williamson, who only claims one from Duke.
"We just talked about football," Williamson said.
UNC is recruiting Williamson, a 6-foot-2, 191-pounder, as both a safety, his high school position, and outside linebacker.
"I just want to play, so it doesn't matter wherever they put me," Williamson said. "I just want to play."
Williamson has made several visits to UNC in the past, including the football game against NC State last fall. However, Saturday provided him an opportunity to truly get to know the coaching staff on and off the field.
"I didn't know that the coaches were that funny and laid back, but also hard working and will get you fired up," Williamson said.
"It's a great campus and the [game day] atmosphere is great. It's a great place to be."
Duke emerged as Williamson leader early in his recruitment. Since then, though, he has tempered those feelings.
"I'm pretty wide open now," Williamson said. "I'm considering Carolina, Duke, Wake [Forest], Clemson – there's a lot of schools I'm considering right now."
A day after visiting UNC, Williamson stopped by East Carolina.
This coming weekend Williamson will return to Duke. He also has trips to Clemson and Wake Forest upcoming.