It's an easy solution for you guys. Until you stop taking state funding, you SHOULD be subject to periodic audits.
BYU, on the other hand, is firmly on record that university funds are not being used for athletics:
Q: What is the Cougar Club?
A: The Cougar Club is the official booster organization for BYU Athletics. The Athletic Department receives no tithing money or tax dollars to run BYU’s athletic programs. The Cougar Club is responsible for raising the funds to pay for Athletic Department expenses including student-athlete scholarships, coaches’ salaries, and recruiting expenses, as well as funding the facilities and programs associated with each of BYU’s 21 athletic teams.