Clarion was in the non-D1 category for just a single tournament (1973).
Sadly, that would also have been their only trophy. Had their points counted they would have finished fourth. Their next best finish came in 1987 (6th).
The most successful non-D1 team was easily Montclair State.
Montclair State and Pitt-Johnstown are the only non-D1 teams to crack 20 points three times.
Of course, Pitt-Johnstown's team was a team of one each time.
Nebraska Omaha led the way with 9 appearances in the 19 years this was a thing.
I am still QA-ing the scoring data, so everything could be wrong.
But hopefully not.
But maybe.