Numbers came from a TAMU article on ticket sales, believe it said season ticket holders got around 32,000. Kyle Field holds ~83k (but should be over 100k in 2 years), so by the time you take students, season tickets, and SEC allotment, you have about 13k remaining. I think the lower bowl visitor seats are on the student side in the far corner near the endzone with the crappy bleachers, at least thats where I heard the LSU fans were at last year. I'm seem to remember when I went to Utah State vs TAMU a few years ago that is where the very small Utah State fans sat.
Will be interesting to see if the visiting teams ticket allotment increases when they add more seats.