The best way I can think to describe UNC recruitment is competitive but not insane. I'm relatively new as an advisor but I wasn't aware of chapters that needed to COB. Very few if any do to my knowledge. You will want to maximize your options every round. I believe all chapters use the release figures method so the harshest cuts should come after the first round. Although I have known some PNM to get heavy cuts after rounds one and two. If you have an open mind, ignore the tent talk, and you do indeed go to every party you are invited to you, you stand a very good chance of receiving a bid.
Good Luck!