This is Cher, the first Expert who answered you.
I'm so sorry for any confusion. Of course, I would have recommended the closest enrollment center to your location, but the one recommended by the other expert, above, was only open for a limited amount of time in March. From: http://www.identogo.com/msn
"Enroll in TSA Pre✓® at Dane County Regional International Airport
Weekdays, March 7 – 25, 2016 (Closed Saturdays and Sundays)
10:00 a.m. to 7:00 p.m. (Closed 1:00 – 2:00 p.m. for lunch)
Main Terminal Concourse, adjacent to South Escalator Pre-Security "
This was only in effect for part of March of this year. Please see more, here:
Please note, it says, "Temporary Location Will Allow Onsite Enrollments March 7 – 11, 2016"
In addition, this location did NOT come up, when I researched the locations closest to you, today, in Madison, WI.
I hope this helped you further and please take a moment to rate my answer positively if it was helpful to you. If you have any additional questions, just click 'Reply.'