Mattes, a 6-foot-6, 260-pound offensive tackle from Concord (N.C.) Robinson, was hosted by Kyle Jolly, who starts at left tackle for the Tar Heels.
"He took me around, showed me the ropes, showed me where the hangout spots are on Franklin Street," Mattes said. "He was a great host and showed me a great time… Saturday night was a great time – unbelievable actually, because Kyle Jolly just knew everybody and introduced me to everybody."
Mattes' basketball game Friday evening forced him to arrive late in Chapel Hill that night. The following day, his official visit kicked off with a tour of the facilities and meetings with various members of the academic staff.
"I got to meet with some of the business advisors," Mattes said. "They told me what it would take to be in the business school."
Later that afternoon, Mattes had lunch with head coach Butch Davis, offensive line coach Sam Pittman, and UNC offensive linemen Jolly, Garrett Reynolds, and Mike Ingersoll.
"Coach Davis talked to my parents and I just talked to the linemen to see what it is like up at Carolina and just asked them all of my questions," Mattes said. "I was just seeing what a normal day is like, seeing about the depth chart, seeing what it would take to be a business major, seeing how they run things tutoring-wise, and what their daily routine looks like."
Jolly then took Mattes out to show him the Chapel Hill night life. The next morning, Mattes was greeted with breakfast at Pittman's house.
"I was really impressed when Coach Pittman invited me over to have breakfast over at his own house," Mattes said. "His wife cooked us breakfast and that was really cool. It felt like a real family type thing."
Pittman and Mattes returned to campus for a quick film session.
"I watched film with him and he talked about coming in, probably red-shirting and preparing as the left tackle of the future," Mattes said. "Maybe not my red-shirt freshman year, but my sophomore year I'll have a chance to compete for a starting job. I'll get plenty of reps my red-shirt freshman year."
Mattes closed the visit with the customary one-on-one meeting with Davis.
"He answered even more questions for me," Mattes said. "I was really impressed by everything he said. He said he's going to turn around Carolina and make it a powerhouse sooner or later in the state. It's going to be sooner if you ask me."
Amid his official visit slate, Mattes isn't prepared to name a leader.
"Really, I haven't come out and really thought about true favorites yet," Mattes said. "I'm not going to discriminate against the two [visits] I haven't taken yet. I'm going to wait until after I take those two and think about what one I liked the best."
Mattes, who has already officially visited NC State and Virginia, will take official visits to Clemson on January 11th and South Carolina on January 18th.