http://www.ncaa.org/stats/m_basketball/attendance/2004_basketball_attend.pdf
This is for 2003-2004 season.
Looks like Denver barely broke 1,500.
Nobody in D-2 or D-3 approached 5,000.
Kind of funny that (1) North Dakota outdraws NDSU for basketball, however, at UND, 2,550 for basketball, 10,870 for hockey the same season.
As for the WAC, this is what they get to look at (oh, you take me 100% seriously... at your peril):
Alaska Anchorage 2,275
Augustana 2,591
Cal Davis 2,313
Cal Poly 2,792
Cal State Bakersfield 2,427
Creighton 12,016
Denver 1,569
Eastern Washington 2,765
Lamar 4,063
Louisiana-Lafayette 4,881
Montana 3,605
Montana State 3,644
Nebraska-Kearney 3,324
North Dakota 2,550
North Dakota State 2,440
North Texas 2,031
Northwest Missouri State 2,081
Oral Roberts 5,575
Pacific 3,801
Pittsburg State 2,179
Portland State 981
St. Cloud State 2,764
South Dakota 3,076
South Dakota State 3,375
Southern Utah 1,932
Texas Christian 4,623
Texas-Pan American 1,889
UC Irvine 2,768
UC Santa Barbara 2,374
UMKC 3,074
Weber State 4,984
Western Kentucky 5,372
Wichita State 10,090
Wyoming 8,201
Speaking of Karl Benson:
Boise State 5,356 (the highest it will be for a while)
Fresno State 13,686
Hawaii 7,443
Idaho 2,482
Louisiana Tech 2,085
Nevada 8,061
New Mexico State 6,139
San Jose State 1,167
Utah State 8,465