"To me it means everything with my basketball career," he added. "Thinking about all the people that I played against during the high school season that don't have the opportunity to come out here and play with the best."
McAdoo, a standout at Norfolk (Va.) Christian, is participating in the event with future teammates and fellow North Carolina signee P.J. Hairston. They have used the event to bond.
"I didn't really know P.J. that much, but I really feel like we are getting to closer and we are getting to go down to Carolina and hopefully we can finish out strong and hopefully we can win a national championship," McAdoo said.
Most know Hairston, a 6-foot-5 wing, as a knock down shooter, but McAdoo said he's diversifying his game.
"He's really developed," he said. "At first he was kind of one-dimensional shooter. I think now he has that big body and he's developed into a pro two. Him being able to putting the ball on the floor is really going to help him at Carolina."
McAdoo and Hairston aren't too far away from heading down to Chapel Hill and that's been a topic among the players participating in the McDonald's All-American festivities.
"It's weird," he said. "From asking all the other guys we are basically going the earliest. We are going June 12th. Knowing that we are going in two and a half months is crazy. We are getting ready to go down for the next four years of our lives."
McAdoo has spent countless hours in the gym preparing for college and playing at the next level. He said he's been trying to work on all aspects of his game.
"I've been really trying to work on my low post game, but I'm still trying to be versatile," he pointed out. "I don't really want to make my game all about posting up. But I don't want to be one of those big guys that people look at and say he's soft because he doesn't want to go in the paint.
"I've just been really trying to get in the gym because I know at North Carolina they are going to have me in the post, which is fine," McAdoo explained. "I know they play an up and down type of game. I'm looking forward to banging with the big guys but also taking people out to the wing."
An early commitment to Carolina, McAdoo said he fell in love with the program at a young age. He said he picked UNC because of their past success, player development and Roy Williams.
"I think it was just their ability to put guys in the pros and develop them," McAdoo said. "Coach Roy and all of them are one big family. It's always been a dream of mine because my dad grew up in Carolina."
"They are kind of thin as far as post players go and I want to start as a freshman or play a lot as a freshman," he added.
Once on campus, McAdoo has major expectations for the Tar Heels.
"No. 1," he exclaimed. "People doubted them this year and look what happened. People keep asking me, but I don't know who is coming back and I don't know who is leaving. I hope they all come back."
But for now, McAdoo has to finish out his high school career and he's hoping to do that in glowing fashion on Wednesday night.
"Hopefully I'm going to go out there and rebound and play my game and maybe take the MVP back to Virginia."
The game tips off Wednesday at 10 p.m. on ESPN.