Yes, conference tournament games count toward NCHSAA basketball in terms of a team's win-loss record, RPI rankings, and playoff seeding
Don,
Not saying you are wrong, but there are a couple points in the handbook that seems like the final RPI would be based just on final regular season. The statements below are copied straight from the handbook.
4.1.11 (c) Determining NCHSAA Playoff Representatives -
Playoff berths for bracketed sports will awarded based on the final regual season standing, as determined by the MaxPreps Final RPI, or other designated platform (i.e. RankWreslting). MaxPreps RPI values are presented on the website with four decimal places, in the event of a tie, the NCHSAA will examine as many decimal places as necessary to break the tie. Once the qualifying teams in each classification are determined, they will be divided into two regions of equal size (East and West) based on the longitude of each school. Schools are then seeded based solely on the MaxPreps Final RPI.
It also states that:
4.3.1 (e) Number of Regular Season Contests - No more than three per week. During any two weeks of the regular season, four games may be played, provided the fourth game is on a non-school day. (1) Total, 24 games. A student-athlete is limited to one game a day. Junior varsity tournament games are part of the 24-game limit.
(2) Varsity conference tournament games are considered part of the state playoffs.
4.3.2 Playoffs (a) Conference Tournaments - Do not report berths to the NCHSAA. Tournaments, if played, should end on the Friday night prior to the seeding date. Conference tournament games must be indicated as such in MaxPreps. (b) Qualifiers/Seeding - [See Rule 4.1.11(c)]