Bonnafon has attended camp at U of L and was at Papa John's Cardinal Stadium for several games last season.
So, Bonnafon figured he knew what to expect when he was one of 60-plus recruits on campus Saturday for U of L's Junior Day.
But he was wrong.
"It was way more than even I expected," Bonnafon told Cardinal Authority. "I was really impressed. It was just all of the coaches and how passionate they are about building up this program. It's great to see.
"I also got to see more things, some things I had some questions about like school and tutoring and just the whole academic side. They talked to us about everything and it really made me more comfortable with my decision."
Bonnafon said after listening to the coaches and hearing the academic side of things from U of L officials that he feels "very confident" he made the right pick.
"It seems like I am going to have a smooth transition coming from Trinity," Bonnafon said. "It was really good to hear."
Bonnafon said he was "surprised" to see the number of other prospects in attendance and said he had the chance to chat with a few.
One prospect he chatted up about the program during the basketball game at the Yum Center was Tucker, Ga., linebacker Detric Dukes.
"There were some high-caliber prospects there," Bonnafon said. "It was a fun experience to talk to those guys and try to get them on board. I wasn't expecting that many people to come plus some of the distances they traveled.
It's great just to see kids traveling that far to come to see the football program at Louisville. It really speaks volumes."
Bonnafon picked the Cardinals over Illinois and serious interest from Ohio State and several others. A dual-threat quarterback, had over 40 total touchdowns on the freshman team at Trinity. He was the starting JV quarterback as a sophomore. He completed 6 of 8 passes for 280 yards and one TD on the varsity level.
He was the backup at Trinity the past two seasons on the varsity level. As a junior, Bonnafon caught 37 passes for 509 yards and six touchdowns and completed 4 of 4 passes for 42 yards and three TDs.
Bonnafon said he has heard from several other schools since he committed, noting Kentucky offered him a scholarship two weeks ago.
"I'm solid with Louisville," he said. "But I don't want to show any disrespect to any other school. I'm not going to turn it down if they want to recruit me."